Method and apparatus for transmitting and receiving signal in wireless communication system

ABSTRACT

A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.17/564,984, filed on Dec. 29, 2021, which is a continuation ofInternational Application No. PCT/KR2020/009160, filed on Jul. 13, 2020,which claims the benefit of Korean Application Nos. 10-2019-0142354,filed on Nov. 8, 2019, 10-2019-0093964, filed on Aug. 1, 2019,10-2019-0088587, filed on Jul. 22, 2019, and 10-2019-0084797, filed onJul. 12, 2019. The disclosures of the prior applications areincorporated by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to a method and apparatus for use in awireless communication system.

BACKGROUND

Generally, a wireless communication system is developing to diverselycover a wide range to provide such a communication service as an audiocommunication service, a data communication service and the like. Thewireless communication is a sort of a multiple access system capable ofsupporting communications with multiple users by sharing availablesystem resources (e.g., bandwidth, transmit power, etc.). For example,the multiple access system may include one of code division multipleaccess (CDMA) system, frequency division multiple access (FDMA) system,time division multiple access (TDMA) system, orthogonal frequencydivision multiple access (OFDMA) system, single carrier frequencydivision multiple access (SC-FDMA) system, and the like.

SUMMARY

The object of the present disclosure is to provide a method andapparatus for transmitting an uplink channel efficiently in a wirelesscommunication system.

It will be appreciated by persons skilled in the art that the objectsthat could be achieved with the present disclosure are not limited towhat has been particularly described hereinabove and the above and otherobjects that the present disclosure could achieve will be more clearlyunderstood from the following detailed description.

The present disclosure provides a method and apparatus for transmittingand receiving a signal in a wireless communication system.

In an aspect of the present disclosure, a method of transmitting andreceiving a signal by a user equipment (UE) operating in a wirelesscommunication system is provided. The method may include: repeatedlymapping a physical uplink control channel (PUCCH) sequence to each ofresource blocks (RBs) in an interlace; and transmitting a PUCCHincluding the PUCCH sequence in the interlace. A phase shift (PS) valueof the PUCCH sequence may vary depending on an RB index of each RB.

In another aspect of the present disclosure, a communication apparatus(UE) configured to transmit and receive a signal in a wirelesscommunication system is provided. The communication apparatus mayinclude: at least one transceiver; at least one processor; and at leastone memory operably connected to the at least one processor andconfigured to store instructions that, when executed, cause the at leastone processor to perform operations including: repeatedly mapping aPUCCH sequence to each of RBs in an interlace; and transmitting a PUCCHincluding the PUCCH sequence in the interlace. A PS value of the PUCCHsequence may vary depending on an RB index of each RB.

In another aspect of the present disclosure, an apparatus for a UE isprovided. The apparatus may include: at least one processor; and atleast one computer memory operably connected to the at least oneprocessor and configured to, when executed, cause the at least oneprocessor to perform operations including: repeatedly mapping a PUCCHsequence to each of RBs in an interlace; and transmitting a PUCCHincluding the PUCCH sequence in the interlace. A PS value of the PUCCHsequence may vary depending on an RB index of each RB.

In a further aspect of the present disclosure, a computer-readablestorage medium having at least one computer program that, when executed,cause at least one processor to perform operations. The operations mayinclude: repeatedly mapping a PUCCH sequence to each of RBs in aninterlace; and transmitting a PUCCH including the PUCCH sequence in theinterlace. A PS value of the PUCCH sequence may vary depending on an RBindex of each RB.

In the method and apparatuses, the PS value may be determined by aspecific pattern to have a value for each RB.

In the method and apparatuses, the specific pattern may be determined insuch a manner that a PS value of an RB with a lowest index in theinterlace is fixed to 1 and PS values to be applied to remaining RBs inthe interlace are selected based on a peak to average power ratio (PAPR)and a cube metric (CM).

In the method and apparatuses, RB indices may be assigned sequentiallyto the RBs based on frequency positions of the RBs in the interlace.

In the method and apparatuses, a cyclic shift (CS) value may be appliedto each RB, and the CS value may vary depending on the RB index of eachRB.

The communication apparatus may include an autonomous driving vehiclecommunicable with at least a UE, a network, and another autonomousdriving vehicle other than the communication apparatus.

The above-described aspects of the present disclosure are only some ofthe preferred embodiments of the present disclosure, and variousembodiments reflecting the technical features of the present disclosuremay be derived and understood from the following detailed description ofthe present disclosure by those skilled in the art.

According to an embodiment of the present disclosure, a communicationapparatus may transmit an uplink channel more efficiently in a differentway from the prior art.

It will be appreciated by persons skilled in the art that the effectsthat can be achieved with the present disclosure are not limited to whathas been particularly described hereinabove and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a radio frame structure.

FIG. 2 illustrates a resource grid during the duration of a slot.

FIG. 3 illustrates a self-contained slot structure.

FIG. 4 illustrates an acknowledgment/negative acknowledgment (ACK/NACK)transmission process.

FIGS. 5A and 5B illustrate a wireless communication system supporting anunlicensed band.

FIG. 6 illustrates an exemplary method of occupying resources in anunlicensed band.

FIGS. 7 and 8 are flowcharts illustrating channel access procedures(CAPs) for signal transmission in an unlicensed band.

FIG. 9 illustrates a resource block (RB) interlace.

FIGS. 10 to 25 are a diagram illustrating uplink (UL) channeltransmission according to the embodiments of the present disclosure.

FIGS. 26 to 29 illustrate devices according to an embodiment of thepresent disclosure.

DETAILED DESCRIPTION

The following technology may be used in various wireless access systemssuch as code division multiple access (CDMA), frequency divisionmultiple access (FDMA), time division multiple access (TDMA), orthogonalfrequency division multiple access (OFDMA), single carrier frequencydivision multiple access (SC-FDMA), and so on. CDMA may be implementedas a radio technology such as universal terrestrial radio access (UTRA)or CDMA2000. TDMA may be implemented as a radio technology such asglobal system for mobile communications (GSM)/general packet radioservice (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA maybe implemented as a radio technology such as institute of electrical andelectronics engineers (IEEE) 802.11 (wireless fidelity (Wi-Fi)), IEEE802.16 (worldwide interoperability for microwave access (WiMAX)), IEEE802.20, evolved UTRA (E-UTRA), and so on. UTRA is a part of universalmobile telecommunications system (UMTS). 3rd generation partnershipproject (3GPP) long term evolution (LTE) is a part of evolved UMTS(E-UMTS) using E-UTRA, and LTE-advanced (LTE-A) is an evolution of 3GPPLTE. 3GPP new radio or new radio access technology (NR) is an evolvedversion of 3GPP LTE/LTE-A.

For clarity of description, the present disclosure will be described inthe context of a 3GPP communication system (e.g., LTE and NR), whichshould not be construed as limiting the spirit of the presentdisclosure. LTE refers to a technology beyond 3GPP TS 36.xxx Release 8.Specifically, the LTE technology beyond 3GPP TS 36.xxx Release 10 iscalled LTE-A, and the LTE technology beyond 3GPP TS 36.xxx Release 13 iscalled LTE-A pro. 3GPP NR is the technology beyond 3GPP TS 38.xxxRelease 15. LTE/NR may be referred to as a 3GPP system. “xxx” specifiesa technical specification number. LTE/NR may be generically referred toas a 3GPP system. For the background technology, terminologies,abbreviations, and so on as used herein, refer to technicalspecifications published before the present disclosure. For example, thefollowing documents may be referred to.

3GPP NR

38.211: Physical Channels and Modulation

38.212: Multiplexing and channel coding

38.213: Physical layer procedures for control

38.214: Physical layer procedures for data

38.300: NR and NG-RAN Overall Description

38.331: Radio Resource Control (RRC) protocol specification

FIG. 1 illustrates a radio frame structure used for NR.

In NR, UL and DL transmissions are configured in frames. Each radioframe has a length of 10 ms and is divided into two 5-ms half-frames.Each half-frame is divided into five 1-ms subframes. A subframe isdivided into one or more slots, and the number of slots in a subframedepends on a subcarrier spacing (SCS). Each slot includes 12 or 14OFDM(A) symbols according to a cyclic prefix (CP). When a normal CP isused, each slot includes 14 OFDM symbols. When an extended CP is used,each slot includes 12 OFDM symbols. A symbol may include an OFDM symbol(or a CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fouriertransform-spread-OFDM (DFT-s-OFDM) symbol).

Table 1 exemplarily illustrates that the number of symbols per slot, thenumber of slots per frame, and the number of slots per subframe varyaccording to SCSs in a normal CP case.

TABLE 1 SCS (15*2{circumflex over ( )}u) N^(slot) _(symb) N^(frame, u)_(slot) N^(subframe, u) _(slot) 15 KHz (u = 0) 14 10 1 30 KHz (u = 1) 1420 2 60 KHz (u = 2) 14 40 4 120 KHz (u = 3) 14 80 8 240 KHz (u = 4) 14160 16 * N^(slot) _(symb): number of symbols in a slot * N^(frame, u)_(slot): number of slots in a frame * N^(subframe, u) _(slot): number ofslots in a subframe

Table 2 illustrates that the number of symbols per slot, the number ofslots per frame, and the number of slots per subframe vary according toSCSs in an extended CP case.

TABLE 2 SCS (15*2{circumflex over ( )}u) N^(slot) _(symb) N^(frame, u)_(slot) N^(subframe, u) _(slot) 60 KHz (u = 2) 12 40 4

In the NR system, different OFDM(A) numerologies (e.g., SCSs, CPlengths, and so on) may be configured for a plurality of cellsaggregated for one UE. Accordingly, the (absolute time) duration of atime resource (e.g., a subframe, a slot, or a transmission time interval(TTI)) (for convenience, referred to as a time unit (TU)) composed ofthe same number of symbols may be configured differently between theaggregated cells.

In NR, various numerologies (or SCSs) may be supported to supportvarious 5th generation (5G) services. For example, with an SCS of 15kHz, a wide area in traditional cellular bands may be supported, whilewith an SCS of 30 kHz or 60 kHz, a dense urban area, a lower latency,and a wide carrier bandwidth may be supported. With an SCS of 60 kHz orhigher, a bandwidth larger than 24.25 kHz may be supported to overcomephase noise.

An NR frequency band may be defined by two types of frequency ranges,FR1 and FR2. FR1 and FR2 may be configured as described in Table 3below. FR2 may be millimeter wave (mmW).

TABLE 3 Frequency Range Corresponding designation frequency rangeSubcarrier Spacing FR1  450 MHz-7125 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

FIG. 2 illustrates a resource grid during the duration of one slot.

A slot includes a plurality of symbols in the time domain. For example,one slot includes 14 symbols in a normal CP case and 12 symbols in anextended CP case. A carrier includes a plurality of subcarriers in thefrequency domain. A resource block (RB) may be defined by a plurality of(e.g., 12) consecutive subcarriers in the frequency domain. A bandwidthpart (BWP) may be defined by a plurality of consecutive (physical) RBs((P)RBs) in the frequency domain and correspond to one numerology (e.g.,SCS, CP length, and so on). A carrier may include up to N (e.g., 5)BWPs. Data communication may be conducted in an active BWP, and only oneBWP may be activated for one UE. Each element in a resource grid may bereferred to as a resource element (RE), to which one complex symbol maybe mapped.

In a wireless communication system, a UE receives information from a BSin downlink (DL), and the UE transmits information to the BS in uplink(UL). The information exchanged between the BS and UE includes data andvarious control information, and various physical channels/signals arepresent depending on the type/usage of the information exchangedtherebetween. A physical channel corresponds to a set of resourceelements (REs) carrying information originating from higher layers. Aphysical signal corresponds to a set of REs used by physical layers butdoes not carry information originating from the higher layers. Thehigher layers include a medium access control (MAC) layer, a radio linkcontrol (RLC) layer, a packet data convergence protocol (PDCP) layer, aradio resource control (RRC) layer, and so on.

DL physical channels include a physical broadcast channel (PBCH), aphysical downlink shared channel (PDSCH), and a physical downlinkcontrol channel (PDCCH). DL physical signals include a DL referencesignal (RS), a primary synchronization signal (PSS), and a secondarysynchronization signal (SSS). The DL RS includes a demodulationreference signal (DM-RS), a phase tracking reference signal (PT-RS), anda channel state information reference signal (CSI-RS). UL physicalchannel include a physical random access channel (PRACH), a physicaluplink shared channel (PUSCH), and a physical uplink control channel(PUCCH). UL physical signals include a UL RS. The UL RS includes aDM-RS, a PT-RS, and a sounding reference signal (SRS).

FIG. 3 illustrates a structure of a self-contained slot.

In the NR system, a frame has a self-contained structure in which a DLcontrol channel, DL or UL data, a UL control channel, and the like mayall be contained in one slot. For example, the first N symbols(hereinafter, DL control region) in the slot may be used to transmit aDL control channel, and the last M symbols (hereinafter, UL controlregion) in the slot may be used to transmit a UL control channel. N andM are integers greater than or equal to 0. A resource region(hereinafter, a data region) that is between the DL control region andthe UL control region may be used for DL data transmission or UL datatransmission. For example, the following configuration may beconsidered. Respective sections are listed in a temporal order.

In the present disclosure, a base station (BS) may be, for example, agNode B (gNB).

UL Physical Channels/Signals

(1) PUSCH

A PUSCH may carry UL data (e.g., uplink shared channel (UL-SCH)transport block (TB)) and/or uplink control information (UCI). The PUSCHmay be transmitted based on a cyclic prefix orthogonal frequencydivision multiplexing (CP-OFDM) waveform or a discrete Fourier transformspread OFDM (DFT-s-OFDM) waveform. When the PUSCH is transmitted basedon the DFT-s-OFDM waveform, the UE may transmit the PUSCH by applyingtransform precoding. For example, when the transform precoding is notallowed (e.g., when the transform precoding is disabled), the UE maytransmit the PUSCH based on the CP-OFDM waveform. When the transformprecoding is allowed (e.g., when the transform precoding is enabled),the UE may transmit the PUSCH based on the CP-OFDM waveform orDFT-s-OFDM waveform. PUSCH transmission may be dynamically scheduled bya PDCCH (dynamic scheduling) or semi-statically scheduled by higherlayer signaling (e.g., RRC signaling) (and/or Layer 1 (L1) signaling(e.g., PDCCH)) (configured scheduling (CS)). Therefore, in the dynamicscheduling, the PUSCH transmission may be associated with the PDCCH,whereas in the CS, the PUSCH transmission may not be associated with thePDCCH. The CS may include PUSCH transmission based on a Type-1configured grant (CG) and PUSCH transmission based on a Type-2 CG. Forthe Type-1 CG, all parameters for PUSCH transmission may be signaled bythe higher layer. For the Type-2 CG, some parameters for PUSCHtransmission may be signaled by higher layers, and the rest may besignaled by the PDCCH. Basically, in the CS, the PUSCH transmission maynot be associated with the PDCCH.

(2) PUCCH

A PUCCH may carry UCI. The UCI includes the following information.

Scheduling request (SR): The SR is information used to request a UL-SCHresource.

Hybrid automatic repeat and request acknowledgement) (HARQ-ACK): TheHARQ-ACK is a signal in response to reception of a DL signal (e.g.,PDSCH, SPS release PDCCH, etc.). The HARQ-ACK response may includepositive ACK (ACK), negative ACK (HACK), DTX (DiscontinuousTransmission), or NACK/DTX. The HARQ-ACK may be interchangeably usedwith A/N, ACK/NACK, HARQ-ACK/NACK, and the like. The HARQ-ACK may begenerated on a TB/CBG basis.

Channel Status Information (CSI): The CSI is feedback information on aDL channel. The CSI includes a channel quality indicator (CQI), a rankindicator (RI), a precoding matrix indicator (PMI), a precoding typeindicator (PTI), and so on.

Table 4 shows PUCCH formats. The PUCCH formats may be classifiedaccording to UCI payload sizes/transmission lengths (e.g., the number ofsymbols included in a PUCCH resource) and/or transmission structures.The PUCCH formats may be classified into short PUCCH formats (PUCCHformats 0 and 2) and long PUCCH formats (PUCCH formats 1, 3, and 4)according to the transmission lengths.

TABLE 4 Length in PUCCH OFDM symbols Number of format N_(symb) ^(PUCCH)bits Usage Etc 0 1-2  ≤2 HARQ, SR Sequence selection 1 4-14 ≤2 HARQ,[SR] Sequence modulation 2 1-2  >2 HARQ, CP-OFDM CSI, [SR] 3 4-14 >2HARQ, DFT-s-OFDM CSI, [SR] (no UE multiplexing) 4 4-14 >2 HARQ,DFT-s-OFDM CSI, [SR] (Pre DFT OCC)

(0) PUCCH Format 0 (PF0)

Supportable UCI payload size: up to K bits (e.g., K=2)

Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g., X=2)

Transmission structure: only a UCI signal is configured with no DM-RS,and a UCI state is transmitted by selecting and transmitting one of aplurality of sequences.

(1) PUCCH Format 1 (PF1)

Supportable UCI payload size: up to K bits (e.g., K=2)

Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4and Z=14)

Transmission structure: UCI and a DM-RS are configured in different OFDMsymbols based on time division multiplexing (TDM). For the UCI, aspecific sequence is multiplied by a modulation symbol (e.g., QPSKsymbol). A cyclic shift/orthogonal cover code (CS/OCC) is applied toboth the UCI and DM-RS to support code division multiplexing (CDM)between multiple PUCCH resources (complying with PUCCH format 1) (in thesame RB).

(2) PUCCH Format 2 (PF2)

Supportable UCI payload size: more than K bits (e.g., K=2)

Number of OFDM symbols included in one PUCCH: 1 to X symbols(e.g., X=2)

Transmission structure: UCI and a DMRS (DM-RS) are configured/mappedin/to the same symbol based on frequency division multiplexing (FDM),and encoded UCI bits are transmitted by applying only an inverse fastFourier transform (IFFT) thereto with no DFT

(3) PUCCH Format 3 (PF3)

Supportable UCI payload size: more than K bits (e.g., K=2)

Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4and Z=14)

Transmission structure: UCI and a DMRS are configured/mapped in/todifferent symbols based on TDM. Encoded UCI bits are transmitted byapplying a DFT thereto. To support multiplexing between multiple UEs, anOCC is applied to the UCI, and a CS (or interleaved frequency divisionmultiplexing (IFDM) mapping) is applied to the DM-RS before the DFT.

(4) PUCCH Format 4 (PF4 or F4)

Supportable UCI payload size: more than K bits (e.g., K=2)

Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g., Y=4and Z=14)

Transmission structure: UCI and a DMRS are configured/mapped in/todifferent symbols based on TDM. The DFT is applied to encoded UCI bitswith no multiplexing between UEs.

FIG. 4 illustrates an ACK/NACK transmission process. Referring to FIG. 4, the UE may detect a PDCCH in slot #n. The PDCCH includes DL schedulinginformation (e.g., DCI format 1_0 or DCI format 1_1). The PDCCHindicates a DL assignment-to-PDSCH offset, K0 and a PDSCH-to-HARQ-ACKreporting offset, K1. For example, DCI format 1_0 or DCI format 1_1 mayinclude the following information.

Frequency domain resource assignment: Indicates an RB set assigned to aPDSCH.

Time domain resource assignment: Indicates K0 and the starting position(e.g., OFDM symbol index) and length (e.g., the number of OFDM symbols)of the PDSCH in a slot.

PDSCH-to-HARQ_feedback timing indicator: Indicates K1.

After receiving a PDSCH in slot #(n+K0) according to the schedulinginformation of slot #n, the UE may transmit UCI on a PUCCH in slot#(n+K1). The UCI includes an HARQ-ACK response to the PDSCH. In the casewhere the PDSCH is configured to carry one TB at maximum, the HARQ-ACKresponse may be configured in one bit. In the case where the PDSCH isconfigured to carry up to two TBs, the HARQ-ACK response may beconfigured in two bits if spatial bundling is not configured and in onebit if spatial bundling is configured. When slot #(n+K1) is designatedas an HARQ-ACK transmission timing for a plurality of PDSCHs, UCItransmitted in slot #(n+K1) includes HARQ-ACK responses to the pluralityof PDSCHs.

1. Wireless Communication System Supporting Unlicensed Band

FIGS. 5A and 5B illustrate an exemplary wireless communication systemsupporting an unlicensed band applicable to the present disclosure.

In the following description, a cell operating in a licensed band(L-band) is defined as an L-cell, and a carrier of the L-cell is definedas a (DL/UL) LCC. A cell operating in an unlicensed band (U-band) isdefined as a U-cell, and a carrier of the U-cell is defined as a (DL/UL)UCC. The carrier/carrier-frequency of a cell may refer to the operatingfrequency (e.g., center frequency) of the cell. A cell/carrier (e.g.,CC) is commonly called a cell.

When a BS and a UE transmit and receive signals on carrier-aggregatedLCC and UCC as illustrated in FIG. 5A, the LCC and the UCC may beconfigured as a primary CC (PCC) and a secondary CC (SCC), respectively.The BS and the UE may transmit and receive signals on one UCC or on aplurality of carrier-aggregated UCCs as illustrated in FIG. 5B. In otherwords, the BS and UE may transmit and receive signals only on UCC(s)without using any LCC. For an SA operation, PRACH, PUCCH, PUSCH, and SRStransmissions may be supported on a UCell.

Signal transmission and reception operations in an unlicensed band asdescribed in the present disclosure may be applied to theafore-mentioned deployment scenarios (unless specified otherwise).

Unless otherwise noted, the definitions below are applicable to thefollowing terminologies used in the present disclosure.

Channel: a carrier or a part of a carrier composed of a contiguous setof RBs in which a channel access procedure (CAP) is performed in ashared spectrum.

Channel access procedure (CAP): a procedure of assessing channelavailability based on sensing before signal transmission in order todetermine whether other communication node(s) are using a channel. Abasic sensing unit is a sensing slot with a duration of T_(sl)=9 us. TheBS or the UE senses the slot during a sensing slot duration. When powerdetected for at least 4 us within the sensing slot duration is less thanan energy detection threshold X_(thresh), the sensing slot durationT_(sl) is be considered to be idle. Otherwise, the sensing slot durationT_(sl) is considered to be busy. CAP may also be called listen beforetalk (LBT).

Channel occupancy: transmission(s) on channel(s) from the BS/UE after aCAP.

Channel occupancy time (COT): a total time during which the BS/UE andany BS/UE(s) sharing channel occupancy performs transmission(s) on achannel after a CAP. Regarding COT determination, if a transmission gapis less than or equal to 25 us, the gap duration may be counted in aCOT. The COT may be shared for transmission between the BS andcorresponding UE(s).

DL transmission burst: a set of transmissions without any gap greaterthan 16 us from the BS. Transmissions from the BS, which are separatedby a gap exceeding 16 us are considered as separate DL transmissionbursts. The BS may perform transmission(s) after a gap without sensingchannel availability within a DL transmission burst.

UL transmission burst: a set of transmissions without any gap greaterthan 16 us from the UE. Transmissions from the UE, which are separatedby a gap exceeding 16 us are considered as separate UL transmissionbursts. The UE may perform transmission(s) after a gap without sensingchannel availability within a DL transmission burst.

Discovery burst: a DL transmission burst including a set of signal(s)and/or channel(s) confined within a window and associated with a dutycycle. The discovery burst may include transmission(s) initiated by theBS, which includes a PSS, an SSS, and a cell-specific RS (CRS) andfurther includes a non-zero power CSI-RS. In the NR system, the discoverburst includes may include transmission(s) initiated by the BS, whichincludes at least an SS/PBCH block and further includes a CORESET for aPDCCH scheduling a PDSCH carrying SIB1, the PDSCH carrying SIB1, and/ora non-zero power CSI-RS.

FIG. 6 illustrates a resource occupancy method in a U-band. According toregional regulations for U-bands, a communication node in the U-bandneeds to determine whether a channel is used by other communicationnode(s) before transmitting a signal. Specifically, the communicationnode may perform carrier sensing (CS) before transmitting the signal soas to check whether the other communication node(s) perform signaltransmission. When the other communication node(s) perform no signaltransmission, it is said that clear channel assessment (CCA) isconfirmed. When a CCA threshold is predefined or configured by higherlayer signaling (e.g., RRC signaling), the communication node maydetermine that the channel is busy if the detected channel energy ishigher than the CCA threshold. Otherwise, the communication node maydetermine that the channel is idle. The Wi-Fi standard (802.11ac)specifies a CCA threshold of −62 dBm for non-Wi-Fi signals and a CCAthreshold of −82 dBm for Wi-Fi signals. When it is determined that thechannel is idle, the communication node may start the signaltransmission in a UCell. The sires of processes described above may bereferred to as Listen-Before-Talk (LBT) or a channel access procedure(CAP). The LBT, CAP, and CCA may be interchangeably used in thisdocument.

Specifically, for DL reception/UL transmission in a U-band, at least oneof the following CAP methods to be described below may be employed in awireless communication system according to the present disclosure.

DL Signal Transmission Method in U-Band

The BS may perform one of the following U-band access procedures (e.g.,CAPs) for DL signal transmission in a U-band

(1) Type 1 DL CAP Method

In the Type 1 DL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be random. The Type 1DL CAP may be applied to the following transmissions:

Transmission(s) initiated by the BS including (i) a unicast PDSCH withuser plane data or (ii) a unicast PDCCH scheduling user plane data inaddition to the unicast PDSCH with user plane data, or

Transmission(s) initiated by the BS including (i) a discovery burst onlyor (ii) a discovery burst multiplexed with non-unicast information.

FIG. 7 is a flowchart illustrating CAP operations performed by a BS totransmit a DL signal in a U-band.

Referring to FIG. 7 , the BS may sense whether a channel is idle forsensing slot durations of a defer duration T_(d). Then, if a counter Nis zero, the BS may perform transmission (S1234). In this case, the BSmay adjust the counter N by sensing the channel for additional sensingslot duration(s) according to the following steps:

Step 1) (S1220) The BS sets N to N_(init) (N=N_(init)), where N_(init)is a random number uniformly distributed between 0 and CW_(p). Then,step 4 proceeds.

Step 2) (S1240) If N>0 and the BS determines to decrease the counter,the BS sets N to N−1 (N=N−1).

Step 3) (S1250) The BS senses the channel for the additional sensingslot duration. If the additional sensing slot duration is idle (Y), step4 proceeds. Otherwise (N), step 5 proceeds.

Step 4) (S1230) If N=0 (Y), the BS terminates the CAP (S1232). Otherwise(N), step 2 proceeds.

Step 5) (S1260) The BS senses the channel until either a busy sensingslot is detected within an additional defer duration T_(d) or all theslots of the additional defer duration T_(d) are detected to be idle.

Step 6) (S1270) If the channel is sensed to be idle for all the slotdurations of the additional defer duration T_(d) (Y), step 4 proceeds.Otherwise (N), step 5 proceeds.

Table 5 shows that m_(p), a minimum contention window (CW), a maximumCW, a maximum channel occupancy time (MCOT), and an allowed CW size,which are applied to the CAP, vary depending on channel access priorityclasses.

TABLE 5 Channel Access Priority Class (p) m_(p) CW_(min, p) CW_(max, p)T_(mcotp) allowed CW_(p) sizes 1 1 3 7 2 ms {3, 7}  2 1 7 15 3 ms {7,15} 3 3 15 63 8 or 10 ms {15, 31, 63} 4 7 15 1023 8 or 10 ms {15, 31,63, 127, 255, 511, 1023}

The defer duration T_(d) is configured in the following order: durationT_(f) (16 us)+m_(p) consecutive sensing slot durations T_(sl) (9 us).T_(f) includes the sensing slot duration T_(sl) at the beginning of the16-us duration.

The following relationship is satisfied: CW_(min,p)<=CW_(p)<=CW_(max,p).CW_(p) may be initially configured by CW_(p)=CW_(min,p) and updatedbefore step 1 based on HARQ-ACK feedback (e.g., ACK or NACK) for aprevious DL burst (e.g., PDSCH) (CW size update). For example, CW_(p)may be initialized to CW_(min,p) based on the HARQ-ACK feedback for theprevious DL burst. Alternatively, CW_(p) may be increased to the nexthighest allowed value or maintained as it is.

(2) Type 2 DL CAP Method

In the Type 2 DL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be determined. TheType 2 DL CAP is classified into Type 2A/2B/2C DL CAPs.

The Type 2A DL CAP may be applied to the following transmissions. In theType 2A DL CAP, the BS may perform transmission immediately after thechannel is sensed to be idle at least for a sensing durationT_(short_dl)=25 us. Here, T_(short_dl) includes the duration T_(f) (=16us) and one sensing slot duration immediately after the duration T_(f),where the duration T_(f) includes a sensing slot at the beginningthereof.

Transmission(s) initiated by the BS including (i) a discovery burst onlyor (ii) a discovery burst multiplexed with non-unicast information, or

Transmission(s) by the BS after a gap of 25 us from transmission(s) bythe UE within a shared channel occupancy.

The Type 2B DL CAP is applicable to transmission(s) performed by the BSafter a gap of 16 us from transmission(s) by the UE within a sharedchannel occupancy time. In the Type 2B DL CAP, the BS may performtransmission immediately after the channel is sensed to be idle forT_(f)=16 us. T_(f) includes a sensing slot within 9 us from the end ofthe duration. The Type 2C DL CAP is applicable to transmission(s)performed by the BS after a maximum of 16 us from transmission(s) by theUE within the shared channel occupancy time. In the Type 2C DL CAP, theBS does not perform channel sensing before performing transmission.

UL Signal Transmission Method in U-Band

The UE may perform a Type 1 or Type 2 CAP for UL signal transmission ina U-band. In general, the UE may perform the CAP (e.g., Type 1 or Type2) configured by the BS for UL signal transmission. For example, a ULgrant scheduling PUSCH transmission (e.g., DCI formats 0_0 and 0_1) mayinclude CAP type indication information for the UE.

(1) Type 1 UL CAP Method

In the Type 1 UL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) is random. The Type 1 ULCAP may be applied to the following transmissions.

PUSCH/SRS transmission(s) scheduled and/or configured by the BS

PUCCH transmission(s) scheduled and/or configured by the BS

Transmission(s) related to a Random Access Procedure (RAP)

FIG. 8 is a flowchart illustrating CAP operations performed by a UE totransmit a UL signal.

Referring to FIG. 8 , the UE may sense whether a channel is idle forsensing slot durations of a defer duration T_(d). Then, if a counter Nis zero, the UE may perform transmission (S1534). In this case, the UEmay adjust the counter N by sensing the channel for additional sensingslot duration(s) according to the following steps:

Step 1) (S1520) The UE sets N to N_(init) (N=N_(init)), where N_(init)is a random number uniformly distributed between 0 and CW_(p). Then,step 4 proceeds.

Step 2) (S1540) If N>0 and the UE determines to decrease the counter,the UE sets N to N−1 (N=N−1).

Step 3) (S1550) The UE senses the channel for the additional sensingslot duration. If the additional sensing slot duration is idle (Y), step4 proceeds. Otherwise (N), step 5 proceeds.

Step 4) (S1530) If N=0 (Y), the UE terminates the CAP (S1532). Otherwise(N), step 2 proceeds.

Step 5) (S1560) The UE senses the channel until either a busy sensingslot is detected within an additional defer duration T_(d) or all theslots of the additional defer duration T_(d) are detected to be idle.

Step 6) (S1570) If the channel is sensed to be idle for all the slotdurations of the additional defer duration T_(d) (Y), step 4 proceeds.Otherwise (N), step 5 proceeds.

Table 6 shows that m_(p), a minimum CW, a maximum CW, an MCOT, and anallowed CW size, which are applied to the CAP, vary depending on channelaccess priority classes.

TABLE 6 Channel Access Priority Class (p) m_(p) CW_(min, p) CW_(max, p)T_(ulmcot, p) allowed CW_(p) sizes 1 2 3 7 2 ms {3, 7}  2 2 7 15 4 ms{7, 15} 3 3 15 1023 6 ms or 10 ms {15, 31, 63, 127, 255, 511, 1023} 4 715 1023 6 ms or 10 ms {15, 31, 63, 127, 255, 511, 1023}

The defer duration T_(d) is configured in the following order: durationT_(f) (16 us)+m_(p) consecutive sensing slot durations T_(sl) (9 us).T_(f) includes the sensing slot duration T_(sl) at the beginning of the16-us duration.

The following relationship is satisfied: CW_(min,p)<=CW_(p)<=CW_(max,p).CW_(p) may be initially configured by CW_(p)=CW_(min,p) and updatedbefore step 1 based on an explicit/implicit reception response for aprevious UL burst (e.g., PUSCH) (CW size update). For example, CW_(p)may be initialized to CW_(min,p) based on the explicit/implicitreception response for the previous UL burst. Alternatively, CW_(p) maybe increased to the next highest allowed value or maintained as it is.

(2) Type 2 UL CAP Method

In the Type 2 UL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be determined. TheType 2 UL CAP is classified into Type 2A/2B/2C UL CAPs. In the Type 2AUL CAP, the UE may perform transmission immediately after the channel issensed to be idle at least for a sensing duration T_(short_dl)=25 us.Here, T_(short_dl) includes the duration T_(f) (=16 us) and one sensingslot duration immediately after the duration T_(f). In the Type 2A ULCAP, T_(f) includes a sensing slot at the beginning thereof. In the Type2B UL CAP, the UE may perform transmission immediately after the channelis sensed to be idle for the sensing duration T_(f)=16 us. In the Type2B UL CAP, T_(f) includes a sensing slot within 9 us from the end of theduration. In the Type 2C UL CAP, the UE does not perform channel sensingbefore performing transmission.

RB Interlace

FIG. 9 illustrates an RB interlace. In a shared spectrum, a set ofinconsecutive RBs (at the regular interval) (or a single RB) in thefrequency domain may be defined as a resource unit used/allocated totransmit a UL (physical) channel/signal in consideration of regulationson occupied channel bandwidth (OCB) and power spectral density (PSD).Such a set of inconsecutive RBs is defined as the RB interlace (orinterlace) for convenience.

Referring to FIG. 9 , a plurality of RB interlaces (interlaces) may bedefined in a frequency bandwidth. Here, the frequency bandwidth mayinclude a (wideband) cell/CC/BWP/RB set, and the RB may include a PRB.For example, interlace #m∈{0, 1, . . . , M−1} may consist of (common)RBs {m, M+m, 2M+m, 3M+m, . . . }, where M represents the number ofinterlaces. A transmitter (e.g., UE) may use one or more interlaces totransmit a signal/channel. The signal/channel may include a PUCCH orPUSCH.

3. PUCCH Transmission in U-Band

The above descriptions (NR frame structure, RACH, U-band system, etc.)are applicable in combination with methods proposed in the presentdisclosure, which will be described later. Alternatively, thedescriptions may clarify the technical features of the methods proposedin the present disclosure.

In addition, PRACH preamble design methods to be described later may berelated to UL transmission, and thus, the methods may be equally appliedto the above-described UL signal transmission methods in U-band systems.To implement the technical idea of the present disclosure in thecorresponding systems, the terms, expressions, and structures in thisdocument may be modified to be suitable for the systems.

For example, UL transmission based on the following PUCCH transmissionmethods may be performed on an L-cell and/or U-cell defined in theU-band systems.

As described above, the Wi-Fi standard (802.11ac) specifies a CCAthreshold of −62 dBm for non-Wi-Fi signals and a CCA threshold of −82dBm for Wi-Fi signals. In other words, a station (STA) or access point(AP) of the Wi-Fi system may transmit no signal in a specific band ifthe STA or AP receives a signal from a device not included in the Wi-Fisystem in the specific band at a power of −62 dBm or higher.

In this document, the term ‘U-band’ may be interchangeably used with theterm ‘shared spectrum’.

In the conventional NR system, five PUCCH formats are configured fromPUCCH format 0 to PUCCH format 4 as shown in Table 4 above. PUCCHformats 0, 1, and 4 are configured to occupy a single PRB, and PUCCHformats 2 and 3 are configured to occupy 1 to 16 PRBs over OFDM symbols.

Hereinafter, PUCCH formats used in a shared spectrum will be described.When a specific device (and/or node) transmits a signal in the sharedspectrum, there may be PSD restrictions. For example, according to theEuropean Telecommunications Standards Institute (ETSI) regulation,signal transmission in a specific band needs to satisfy a PSD of 10dBm/1 MHz. When the SCS is 15 kHz, if a PUCCH is transmitted with PUCCHformat 0 (one PRB and 180 kHz), the maximum allowable power for thePUCCH may be about 10 dBm. In general, the maximum power of the UE is 23dBm, and the maximum allowable power of 10 dBm is significantly lowerthan 23 dBm. If the UE transmits a UL signal at 10 dBm, the maximum ULcoverage supported by the UE may be reduced. If the UE transmits a PUCCHin a wide frequency domain (F-domain) to increase the transmit power, itmay help to solve the problem that the UL coverage is reduced. Asregulations in the shared spectrum, there may be OCB restrictions. Forexample, when a specific device transmits a signal, the signal may needto occupy at least 80% of the system bandwidth. If the system bandwidthis 20 MHz, the signal transmitted by the specific device may need tooccupy more than 16 MHz, which is 80% of 20 MHz.

As a PUCCH structure in consideration of the PSD and OCB regulations,the above-described RB interlace structure may be used. For example, ifa PUCCH sequence of the conventional PUCCH configured to use one PRB asin PUCCH format 0 and/or 1 is repeated over PRBs spaced at specificintervals in the frequency domain in consideration of the OCB, a PUCCHmay be configured. If the PUCCH is transmitted in an RB interlace, thesame PUCCH sequence may be repeatedly transmitted. The repeatedtransmission may increase a peak to average power ratio (PAPR) value anda cube metric (CM) value. However, the lower the PAPR and CM values, thebetter the transmission performance. Accordingly, methods of selecting acyclic shift (CS) value and/or a phase shift (PS) value of a PUCCHsequence for each repetition in consideration of the PAPR and CM when aPUCCH is transmitted in an RB interlace in the frequency domain will beproposed.

The methods proposed in the present disclosure may be applied to otheruse cases as well as the NR U-band. For example, the methods proposed inthe present disclosure may be used for an NR-based non-terrestrialnetwork (NTN).

3.1. Embodiment 1

According to Embodiment 1, when PUCCH sequences are transmitted in PRBs,starting CS values to be applied to the PUCCH sequences may be setdifferent from each other. Hereinafter, a PUCCH sequence may be simplyreferred to as a sequence. A starting CS value may be denoted byCS_start.

Specifically, a single PUCCH signal may be configured with a pluralityof PUCCH sequences. The plurality of PUCCH sequences may repeatedlymapped and/or transmitted over a plurality of PRBs included in oneinterlace. For example, when there are a plurality of PRBs included inone interlace, one individual/independent PUCCH sequence may be mappedto and/or transmitted in each PRB. A CS value applied to each sequencemay be configured to have a different value for each PRB.

The CS may be set and/or applied to different values by applying a PS toeach element/sample, which is included in one (frequency-domain)sequence, and/or subcarriers to which the element/sample is mapped. Forexample, if CS=a is multiplied by a set of L elements/samples includedin a length-L sequence, {s_0, s_1, . . . , s_(L−1)}, the sequence towhich the CS is applied may be represented by {e^(i)*⁰*^(a)* s_0,e^(i)*¹*^(a)* s_1, . . . , e^(i)*^((L−1))*^(a)* s_(L−1)}

As an example, considering transmission of 2-bit UCI on PUCCH format 0(PF0) (simply referred to as 2-bit UCI on PF0), the 2-bit UCI may berepresented by four CS values: CS_start, CS_start+3, CS_start+6, andCS_start+9. In this case, a different CS_start value may be applied toeach PRB (or sequence). For example, the CS_start value may bedetermined as a function of PRB indices (in the PUCCH) included in aPUCCH resource. A PRB index, which is an input value for determining theCS_start value, may be referred to as a logical PRB index. In addition,the CS_start value may be configured to have a specific pattern for eachPRB (or sequence). Hereinafter, the PRB index may be interchangeablyused with the logical PRB index.

As another example, considering transmission of 2-bit UCI on PUCCHformat 1 (PF1) (simply referred to as 2-bit UCI on PF1), a CS valuecorresponding to CS_start may be applied to sequences mapped to both aUCI symbol and a DMRS symbol. In this case, the CS_start value may varyfor each PRB (or sequence). For example, the CS_start value may bedetermined as a function of PRB indices (in the PUCCH) included in aPUCCH resource. In addition, the CS_start value may be configured tohave a specific pattern for each PRB (or sequence). In this case, the2-bit UCI may be mapped to the UCI symbol based on quadrature phaseshift keying (QPSK).

There may be a pre-given/configured CS value in generating the PUCCHsequences of PF0 and PF1. The pre-given/configured CS value may be forinter-cell interference randomization. When the pre-given and/orconfigured CS value is assumed to be CS=a, a CS (or CS_start) valuedetermined according to each embodiment may be additionally applied to asequence obtained by applying CS=a.

As described above, when a different (starting) CS value is applied to aPUCCH sequence, the PUCCH sequence with the different CS value may bemapped to each PRB, thereby having an advantage in terms of PAPR and/orCM performance. The method described in Embodiment 1 may be representedas shown in FIG. 10 if there are 10 PRBs and the length of each sequenceis 12.

For example, when the method of applying a different CS to each PRB isreflected in the sequence generation equations for PF0 and PF1, it maybe represented as follows.

(1) PF0

A base sequence for PF0 is defined according to Equation 1.

x(l·N _(SC) ^(RB) +n)=r _(u,v) ^((α,δ))(n)   [Equation 1]

In Equation 1, n denotes the length of a PUCCH sequence and is definedby n=0,1, . . . , N _(SC) ^(RB)−1. In the conventional NR system, sincePF0 is transmitted in one RB, N_(SC) ^(RB)=12 is satisfied. On the otherhand, in NR-U, PF0 may be transmitted over a plurality of PRBs. Thus,when PF0 is transmitted in NR-U, the method of applying a different CSto each PRB may be represented by Equation 2.

x(RB_(i) ,l·N _(SC) ^(RB) +n)=r _(u,v) ^((α,δ))   [Equation 2]

In Equation 2, i denotes a PRB index and is defined by i=0,1, . . . ,N_(PUCCH) ^(RB)−1. N_(PUCCH) ^(RB) denotes the total number of PRBs for(repeatedly) transmitting the corresponding PUCCH. In this case, α_(i)indicating the CS may vary depending on the PRB index.

(2) PF1

A base sequence for PF0 is defined according to Equations 3 and 4.

y(n)=d(0)·r _(u,v) ^((α,δ))(n)   [Equation 3]

z(m′N _(SC) ^(RB) N _(SF,0) ^(PUCCH,1) +mN _(SC) ^(RB) +n)=w_(i)(n)·y(n)   [Equation 4]

Similarly to PF0, n is the length of a PUCCH sequence and defined byn=0,1, . . . , N_(SC) ^(RB)−1. In the conventional NR system, since PF0is transmitted in one RB, N_(SC) ^(RB)=12 is satisfied. On the otherhand, in NR-U, PF0 may be transmitted over a plurality of PRBs. Thus,when PF1 is transmitted in NR-U, the method of applying a different CSto each PRB may be represented by Equations 5 and 6.

y(RB_(i) ,n)=d(0)·r _(u,v) ^((α,δ))(n)   [Equation 5]

z(RB_(i) ,m′N _(SC) ^(RB) N _(SF,0) ^(PUCCH,1) +mN _(SC) ^(RB) +n)=w_(i)(RB_(i) ,n)·y(RB_(i) ,n)   [Equation 6]

In Equations 5 and 6, i denotes a PRB index and is defined by i=0,1, . .. , N_(PUCCH) ^(RB)−1. N_(PUCCH) ^(RB) denotes the total number of PRBsfor (repeatedly) transmitting the corresponding PUCCH. In this case,α_(i) indicating the CS may vary depending on the PRB index.

Hereinafter, Embodiment 1 will be described in more detail.

Embodiment 1-1

A starting CS value applied to a PUCCH sequence to be repeatedlytransmitted in each of a plurality of PRBs included in one interlace maybe configured to have a different value for each PRB group.

According to Embodiment 1-1, PRBs included in one interlace may bedivided into two or more groups.

As an example, when one interlace includes two groups, the two groupsmay be defined as follows: a PRB group of even numbered PRBs and a PRBgroup of odd numbered PRBs. The PRB group of even numbered PRBs mayinclude PRBs with PRB indices 0, 2, 4, . . . , and the PRB group of oddnumbered PRBs may include PRBs with PRB indices 1, 3, 5, . . . . TheCS_start value to be applied to the PRB group of even numbered PRBs maybe X, and the CS_start value to be applied to the PRB group of oddnumbered PRBs may be Y, where X and Y have different values. Forexample, X=0 and Y=1.

As another example, one interlace may include three groups. A firstgroup may be composed of PRBs with PRB indices 0, 3, 6, and 9. A secondgroup may be composed of PRBs with PRB indices 1, 4, and 7 or 1, 4, 7,and 10. A third group may be composed of PRBs with PRB indices 2, 5, and8. The CS_start values to be applied to the first, second, and thirdgroups may be X, Y, and Z, respectively, where X, Y and Z have differentvalues. For example, X=0, Y=1, and Z=2.

The starting CS value may be indicated by the BS to the UE throughhigher layer signaling. Alternatively, the starting CS value may bepreconfigured between the BS and UE.

For example, two PRB groups may be defined as follows: a PRB group ofodd numbered PRBs and a PRB group of even numbered PRBs. The CS_startvalue to be applied to the PRB group of even numbered PRBs may be X, andthe CS_start value to be applied to the PRB group of odd numbered PRBsmay be Y. In this case, initialcyclicshift_evennumberedPRB andinitialcyclicshift_oddnumberedPRB may be introduced into RRC parametersPUCCH-format0 and PUCCH-format1, and the CS_start value may be indicatedby the corresponding parameters. For example, the BS may inform the UEof initialcyclicshift_evennumberedPRB=0 andinitialcyclicshift_oddnumberedPRB=1 to indicate the values of X and Y,respectively.

Table 7 shows PAPRs and CMs measured while changing the starting CSvalue according to Embodiment 1-1 for an interlace composed of 10 PRBs.

TABLE 7 Starting CS value for each PRB PAPR (dB) CM (dB) [0, 0, 0, 0, 0,0, 0, 0, 0, 0] 8.675 10.062 [0, 1, 0, 1, 0, 1, 0, 1, 0, 1] 7.6001 8.218[0, 1, 2, 0, 1, 2, 0, 1, 2, 0] 6.7929 7.286 [0, 1, 2, 3, 4, 0, 1, 2, 3,4] 5.6803 5.057

Embodiment 1-2

A starting CS value applied to a PUCCH sequence to be repeatedlytransmitted in each of a plurality of PRBs included in one interlace maybe configured to sequentially increase or decrease by the value of Xaccording to the PRB index. In this document, X may be expressed as Δ.

The X value may be set smaller than or equal to the sequence length.

PRB indices may be determined based on the frequency positions of PRBsincluded in an interlace. In other words, the PRB indices may bedetermined as logical PRB indices. For example, among PRBs included inone interlace, a PRB at the lowest position in the frequency domain mayhave PRB index 0, and a PRB at the second lowest position in thefrequency domain may have PRB index 1. That is, indexing may besequentially performed up to a PRB at the highest position in thefrequency domain.

A CS value calculated based on the X value and the PRB index may begreater than the sequence length L. An actual CS value may be configuredby wrapping around the calculated CS value with respect to the sequencelength so that the CS value is smaller than the sequence length L. Here,wrapping around may be equivalent to the modulo or modular operation.For example, the actual CS value may be obtained by applying the modulooperation to the calculated CS value.

Tables 8 to 10 show examples in which the starting CS value is obtainedby (X*i) modulo L operation when the PRB index is i and the sequencelength is L. For example, when X=5, i=4, and L=12, the starting CS valuebecomes (5*4) modulo 12=8. X * i may be denoted by m_(int).

Table 8 shows the starting CS value for each PRB index when X=1.

TABLE 8 PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS 0 1 2 3 4 5 6 7 89 10 value

Table 9 shows the starting CS value for each PRB index when X=5.

TABLE 9 PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS 0 5 10 3 8 1 6 114 9 2 value

Table 10 shows the starting CS value for each PRB index when X=2.

TABLE 10 PRB index 0 1 2 3 4 5 6 7 8 9 (10) Starting CS 0 2 4 6 8 10 0 24 6 8 value

The starting CS value may be indicated by the BS to the UE throughhigher layer signaling. In addition, the starting CS value may bepreconfigured between the UE and BS.

When the X value and the sequence length L are coprime numbers,different CS values may be applied to the PUCCH sequence to berepeatedly transmitted in each PRB, thereby having an advantage in termsof PAPR and/or CM performance. Table 11 shows PAPR and CM valuesdepending on X values when one interlace consists of 10 PRBs. Referringto Table 11, it may be seen that the PARR and CM values are the bestwhen X=5.

TABLE 11 PAPR CM X Starting CS value for each PRB (dB) (dB) 0 [0, 0, 0,0, 0, 0, 0, 0, 0, 0] 8.675 10.062 1 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]3.5401 1.569 5 [0, 5, 10, 3, 8, 1, 6, 11, 4, 9] 3.5708 1.488 2 [0, 2, 4,6, 8, 10, 0, 2, 4, 6] 4.9783 3.461

The CS value α_(i) applied to the conventional PUCCH sequence is derivedby Equation 7 below.

$\begin{matrix}{\alpha_{i} = {\frac{2\pi}{N_{SC}^{RB}}\left( {\left( {m_{0} + m_{cs} + {n_{cs}\left( {n_{s,f}^{\mu},{l + l^{\prime}}} \right)}} \right){{mod}N}_{SC}^{RB}} \right)}} & \left\lbrack {{Equation}7} \right\rbrack\end{matrix}$

In Equation 7, n_(s,f) ^(μ) denotes a slot index in a radio frame forthe PUCCH transmission. In addition, l denotes a symbol index for thePUCCH transmission on the assumption that the first OFDM symbol indexfor the PUCCH transmission is 0, and l′ denotes a first OFDM symbolindex for the PUCCH transmission in a slot. Thus, n_(cs) may bedetermined based on time resources allocated to the PUCCH. In addition,m₀ is a PRB offset determined based on RRC parameters, and m_(cs) is avalue determined based on a combination of the PUCCH format, the type ofSR information to be transmitted, and HARQ information. N_(SC) ^(RB)denotes the number of subcarriers in each RB and may be 12 as describedabove. Herein, a subcarrier may be referred to as an RE. The sequencelength may not exceed the number of REs allocated for the PUCCHtransmission. In this specification, the expression of ‘the PUCCHsequence is mapped to the PRB’ or ‘the PUCCH sequence uses one PRB’ maymean that the PUCCH sequence length L is 12.

Equation 8 shows that the starting CS value sequentially increases bythe value of X according to the PRB index based on Embodiment 1-2.

$\begin{matrix}{\alpha_{i} = {\frac{2\pi}{N_{SC}^{RB}}\left( {\left( {m_{0} + m_{cs} + m_{int} + {n_{cs}\left( {n_{s,f}^{\mu},{l + l^{\prime}}} \right)}} \right){{mod}N}_{SC}^{RB}} \right)}} & \left\lbrack {{Equation}8} \right\rbrack\end{matrix}$

According to Equation 8, since the value of m_(int) is X*i, the startingCS value may be obtained by the modulo operation between the sequencelength L and values obtained by adding the value of m_(int) to thevalues used for conventional PUCCH transmission.

3.2. Embodiment 2

According to Embodiment 2, a different PS value may be multiplied by aPUCCH sequence for each PRB included in an interlace.

Specifically, a single PUCCH signal may be configured with a pluralityof PUCCH sequences. The plurality of PUCCH sequences may repeatedlymapped and/or transmitted over a plurality of PRBs included in oneinterlace. For example, when there are a plurality of PRBs included inone interlace, one individual/independent PUCCH sequence may be mappedto and/or transmitted in each PRB. A PS value applied to each sequencemay be configured to have a different value for each PRB. The (starting)CS value applied to each sequence may be set to the same value amongPRBs (or sequences).

The same PS value may be multiplied with each element/sample, which isincluded in one (frequency-domain) sequence, and/or subcarriers to whichthe element/sample is mapped. For example, if PS=a is multiplied by aset of L elements/samples included in a length-L sequence, {s_0, s_1, .. . , s_(L−1)}, the sequence to which the PS is applied may berepresented by {e^(i)*^(a)* s_0, e^(i)*^(a)* s_1, . . . , e^(i)*^(a)*s_(L−1)}.

As an example, considering 2-bit UCI on PF0, a different PS value may bemultiplied by the PUCCH sequence for each PRB. The same CS values of 0,3, 6, and 9 may be applied to the PUCCH sequence for each PRB. Thedifferent PS value may be 1, 1i, −1, or −1i. In this case, the PS valuemay be configured to vary for each PRB (or sequence). For example, thePS value may be determined as a function of PRB indices (in the PUCCH)included in a PUCCH resource. A PRB index, which is an input value fordetermining the PS value, may be referred to as a logical PRB index. Inaddition, the PS value may be configured to have a specific pattern foreach PRB (or sequence).

As another example, considering 2-bit UCI on PF1, different PS valuesmay be multiplied by sequences mapped to a UCI symbol and a DMRS symbolfor each PRB. The same CS value may be applied to the PUCCH sequence foreach PRB. In this case, the PS value may be configured to vary for eachPRB (or sequence). For example, the PS value may be determined as afunction of PRB indices (in the PUCCH) included in a PUCCH resource. Inaddition, the PS value may be configured to have a specific pattern foreach PRB (or sequence).

As described above, when a different PS value is multiplied by a PUCCHsequence, the PUCCH sequence with the different PS value may be mappedto each PRB, thereby having an advantage in terms of PAPR and/or CMperformance. In Embodiment 1, the CS is implemented in the frequencydomain, and the PS value that gradually increases according to the REindex is reflected as the PS of each RE in the same PRB. On the otherhand, according to Embodiment 2, the same PS value is applied to each REin the same PRB. The method described in Embodiment 2 may be representedas shown in FIG. 11 if there are 10 PRBs.

Hereinafter, Embodiment 2 will be described in more detail.

Embodiment 2-1

A PS value to be multiplied by a PUCCH sequence to be repeatedlytransmitted in each of a plurality of PRBs included in one interlace maybe configured to have a specific pattern so that the PS value varies foreach PRB.

The specific PS pattern may be set to values obtained from an experimentusing four PS values of 1, 1i, −1, and −1i.

FIG. 12 illustrates the results of testing PAPR and CM performance byfixing the phase of the first PRB to 1 (i.e., 0°) and applying all fourPS values of 1, 1i, −1, −1i (i.e., 0°, 90°, 180°, and 270°) to theremaining 9 PRBs in an interlace structure composed of 10 PRBs.Specifically, FIG. 12 shows combinations of top 20 PS values based onthe CM performance. The 20 combinations shown in FIG. 12 may beconsidered as the PS value pattern of Embodiment 2.

FIG. 13 illustrates the results of testing PAPR and CM performance byfixing the phase of the first PRB to 1 (i.e., 0°) and applying all fourPS values of 1, 1i, −1, −1i (i.e., 0°, 90°, 180°, and 270°) to theremaining 10 PRBs in an interlace structure composed of 11 PRBs.Specifically, FIG. 13 shows combinations of top 20 PS values based onthe CM performance. The 20 combinations shown in FIG. 13 may beconsidered as the PS value pattern of Embodiment 2.

Particularly, top four PS value patterns show superior PAPR and CMperformance than the other 16 PS value patterns. Accordingly, in FIG. 13, indices 43171, 532523, 421477, and 976621 may be considered as PScombinations to be used in the interlace structure composed of 11 PRBs.

3.3. Embodiment 3

According to Embodiment 3, different UCI bit-to-constellation mappingmay be applied to each PRB.

Specifically, a single PUCCH signal may be configured with a pluralityof PUCCH sequences. The plurality of PUCCH sequences may repeatedlymapped and/or transmitted over a plurality of PRBs included in oneinterlace. For example, when there are a plurality of PRBs included inone interlace, one individual/independent PUCCH sequence may be mappedto and/or transmitted in each PRB. Different UCI bit-to-constellationmapping may be configured and/or applied for each PRB. The same(starting) CS value and/or PS value may be applied to each PRB (orsequence).

As an example, considering 2-bit UCI on PF0, different constellationmapping may be applied to each PUCCH sequence repeatedly mapped toand/or repeatedly transmitted in each of a plurality of PRBs included inone interlace while maintaining Gray coding for a bit set of {00, 01,11, 10} as follows: CS set 1={0+a, 3+a, 6+a, 9+a} and CS set 2={9+a,6+a, 3+a, 0+a}, where a may be one of 0, 3, 6, and 9. Due to theconstellation mapping, different CS sets and/or different values of amay be applied to each PRB. Gray coding refers to a coding scheme inwhich only one digit changes in adjacent digits when a value changes.For example, the number of cases representable by an n-bit binary Graycode may be 2^(n), and a binary Gray code may be represented differently2^(n) times.

As another example, considering 2-bit UCI on PF1, differentconstellation mapping may be applied to QPSK mapping on UCI symbols foreach PRB while maintaining Gray coding for a bit set of {00, 01, 11, 10}as follows: PS set 1={1, 1i, −1, −1i}*b and PS set 2={−1i, −1, 1i, 1}*b,where b may be one of 1, 1i, −1, and −1i. Due to the constellationmapping, different PS sets and/or different values of b may be appliedto each PRB. In addition, a PS may be applied to a DMRS sequence inaccordance with the constellation mapping change in the UCI symbols. Forexample, a phase value to be applied to the DMRS sequence may be a phasevalue mapped to a specific bit in the UCI symbols. The specific bit maybe, for example, bit 00.

According to Embodiment 3, since Gray coding is always maintained, PUCCHtransmission performance may be guaranteed.

3.4. Embodiment 4

According to Embodiment 4, Embodiment 1 and Embodiment 2 may becombined.

Specifically, according to Embodiment 1, a different CS value may beapplied to each PRB, and according to Embodiment 2, a different PS valuemay be applied to each PRB. The number of different sequences generatedby combining Embodiments 1 and 2 is much larger than the number ofdifferent sequences (to be respectively mapped to PRBs) generated byeither only Embodiment 1 or Embodiment 2. Therefore, lower PAPR/CMvalues (better in terms of performance) may be obtained by combiningEmbodiments 1 and 2.

A single PUCCH signal may be configured with a plurality of PUCCHsequences. The plurality of PUCCH sequences may repeatedly mapped and/ortransmitted over a plurality of PRBs included in one interlace. Forexample, when there are a plurality of PRBs included in one interlace,one individual/independent PUCCH sequence may be mapped to and/ortransmitted in each PRB. A CS value applied to each sequence may beconfigured to have a different value for each PRB. In addition, a PSvalue applied to each sequence may configured to have a different valuefor each PRB.

As an example, considering 2-bit UCI on PF0, two bits may be representedby four CS values: CS_start, CS_start+3, CS_start+6, and CS_start+9 asdescribed in Embodiment 1. In this case, a different CS_start value maybe applied to each PRB (or sequence), and at the same time, a differentPS value (e.g. 1, 1i, −1, or −1i) may be multiplied by each PRB (orsequence) to map and/or transmit a PUCCH.

As another example, considering 2-bit UCI on PF1, a CS valuecorresponding to CS_start may be to sequences mapped to both a UCIsymbol and a DMRS symbol as described in Embodiment 1. In this case, adifferent CS_start value may be applied to each PRB (or sequence), andat the same time, a different PS value (e.g. 1, 1i, −1, or −1i) may bemultiplied by each PRB (or sequence) to map and/or transmit a PUCCH.

The method of applying combinations of different CS values and differentPS values to a plurality of PRBs (or sequences) has an advantage interms of PAPR and/or CM performance, compared to the method ofEmbodiment 1 or 2 in which only CS values or PS values are used. FIG. 14is a diagram illustrating Embodiment 4 when there are 10 PRBs and thelength of each sequence is 12.

Hereinafter, Embodiment 4 will be described in more detail.

Embodiment 4-1

A (starting) CS value applied to a PUCCH sequence to be repeatedlytransmitted in each of a plurality of PRBs included in one interlace maybe configured to have a different value for each PRB group.Additionally, a PS value to be multiplied by the PUCCH sequence to bemapped to and/or transmitted in each PRB may be configured to have aspecific pattern so that the PS value varies for each PRB. In otherwords, Embodiment 1-1 and Embodiment 2-1 may be combined. Each PRB maybe identified by the logical PRB index described above.

According to Embodiment 4-1, PRBs included in one interlace may bedivided into two or more groups.

The starting CS value may be indicated by the BS to the UE throughhigher layer signaling. In addition, the starting CS value may bepreconfigured between the UE and BS.

The specific PS pattern may be set to values obtained from an experimentusing four PS values of 1, 1i, −1, and −1i.

[Experiment 1] In an interlace structure composed of 10 PRBs, a startingCS value for each PRB is configured according to a previously proposedpattern (e.g., [0, 1, 0, 1, 0, 1, 0, 1, 0, 1]). Thereafter, PAPR and CMperformance are tested by fixing the phase of the first PRB to 1 (i.e.,0°) and applying all four PS values of [1, 1i, −1, −1i] (i.e., 0°, 90°,180°, 270°) to the remaining 9 PRBs. The first PRB is a PRB with thelowest logical PRB index, i.e., a PRB at the lowest position in thefrequency band. FIG. 15 illustrates combination of top 20 PS values withrespect to the CM performance based on the test results of Experiment 1.

Referring to the results of FIG. 15 , it may be seen that the PAPR andCM performance are improved compared to when only the CS values are setto 0, 1, 0, 1, 0, 1, 0, 1, 0, and 1 and no PS values are applied. Inaddition, it may also be seen that the PAPR and CM performance areimproved compared to when only PS values are applied (in Embodiment 1,the PAPR is about 7.60001 dB and the CM is about 8.218 dB, and inEmbodiment 2-1, the PAPR is about 3.567 dB and the CM is about 1.663dB).

[Experiment 2] In an interlace structure composed of 11 PRBs, a startingCS value for each PRB is configured according to a previously proposedpattern (e.g., [0, 1, 0, 1, 0, 1, 0, 1, 0, 1]). Thereafter, PAPR and CMperformance are tested by fixing the phase of the first PRB to 1 (i.e.,0°) and applying all four PS values of [1, 1i, −1, −1i] (i.e., 0°, 90°,180°, 270°) to the remaining 9 PRBs. The first PRB is a PRB with thelowest logical PRB index, i.e., a PRB at the lowest position in thefrequency band. FIG. 16 illustrates combination of top 20 PS values withrespect to the CM performance based on the test results of Experiment 2.

According to Embodiment 4, the 40 PS combinations obtained from theresults of Experiment 1 and Experiment 2 may be considered when mappingand/or transmitting a single PUCCH signal in an interlace composed of 10or 11 PRBs.

Embodiment 4-2

A (starting) CS value applied to a PUCCH sequence to be repeatedlytransmitted in each of a plurality of PRBs included in one interlace maybe configured to sequentially increase or decrease by the value of Xaccording to the PRB index. Additionally, a PS value to be multiplied bythe PUCCH sequence to be mapped to and/or transmitted in each PRB may beconfigured to have a specific pattern so that the PS value varies foreach PRB. In other words, Embodiment 1-2 and Embodiment 2-1 may becombined.

The X value may be set smaller than or equal to the sequence length.

Each PRB may be identified by the logical PRB index described above.

A CS value calculated based on the X value and the PRB index may begreater than the sequence length L. An actual CS value may be configuredby wrapping around the calculated CS value with respect to the sequencelength so that the CS value is smaller than the sequence length L.

The starting CS value may be indicated by the BS to the UE throughhigher layer signaling. In addition, the starting CS value may bepreconfigured between the UE and BS.

The specific PS pattern may be set to values obtained from an experimentusing four PS values of 1, 1i, −1, and −1i.

[Experiment 1] In an interlace structure composed of 10 PRBs, a startingCS value for each PRB is configured according to a previously proposedpattern (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]). Thereafter, PAPR andCM performance are tested by fixing the phase of the first PRB to 1(i.e., 0°) and applying all four PS values of [1, 1i, −1, −1i] (i.e.,0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is a PRBwith the lowest logical PRB index, i.e., a PRB at the lowest position inthe frequency band. FIG. 17 illustrates combination of top 20 PS valueswith respect to the CM performance based on the test results ofExperiment 1.

Referring to the results of FIG. 17 , the top four results have superiorperformance compared to the rest of the results in terms of the PAPR/CM.

[Experiment 2] In an interlace structure composed of 11 PRBs, a startingCS value for each PRB is configured according to a previously proposedpattern (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]). Thereafter, PAPR andCM performance are tested by fixing the phase of the first PRB to 1(i.e., 0°) and applying all four PS values of [1, 1i, −1, −1i] (i.e.,0°, 90°, 180°, 270°) to the remaining 9 PRBs. The first PRB is a PRBwith the lowest logical PRB index, i.e., a PRB at the lowest position inthe frequency band. FIG. 16 illustrates combination of top 20 PS valueswith respect to the CM performance based on the test results ofExperiment 2.

According to Embodiment 4, the 40 PS combinations obtained from theresults of Experiment 1 and Experiment 2 may be considered when mappingand/or transmitting a single PUCCH signal to and/or in an interlacecomposed of 10 or 11 PRBs.

In particular, the top four combinations (i.e., indices 1, 111026,139811, and 234388 in Experiment 1 and indices 1, 444103, 559241, and937551 in Experiment 2) have the following characteristics. The top fourcombinations may be considered as representative combinations of CS andPS values in Embodiment 4-2.

Index 1 in Experiment 1 (index 1 in Experiment 2): This is a pattern towhich no PS is applied.

Index 111026 in Experiment 1 (index 444103 in Experiment 2): The phaseis shifted by 90° clockwise in the PRB order.

Index 139811 in Experiment 1 (index 559241 in Experiment 2): The phaseis shifted by 180° clockwise (counterclockwise) in the PRB order.

Index 234388 in Experiment 1 (index 937551 in Experiment 2): The phaseis shifted by 90° counterclockwise in the PRB order.

Therefore, when the CS is configured to increase by the value of Xaccording to the PRB index (e.g., [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, (10)]),the PS pattern may be configured to have PS values such that the phaseincreases by the value of Y according to the PRB index.

For example, if Y is Pi/2 (=90°), index 111026 in Experiment 1 (index444103 in Experiment 2) may be configured and/or applied. If Y is Pi(=180°), index 139811 in Experiment 1 (index 559241 in Experiment 2) maybe configured and/or applied. If Y is −Pi/2 (=−90°), index 234388 inExperiment 1 (index 937551 in Experiment 2) may be configured and/orapplied.

3.5 Embodiment 5

Embodiment 1 and Embodiment 3 may be combined. According to Embodiment1, a different CS value may be applied to each PRB, and according toEmbodiment 3, different UCI bit-to-constellation mapping may be appliedto each PRB. Similarly to that described in Clause 3.4, the number ofdifferent sequences generated by combining Embodiments 1 and 3 is muchlarger than the number of different sequences (to be respectively mappedto PRBs) generated by only either Embodiment 1 or Embodiment 3.Therefore, lower PAPR/CM values (better in terms of performance) may beobtained by combining Embodiments 1 and 3.

That is, in addition to applying a different starting CS value to aPUCCH sequence repeatedly transmitted over a plurality of PRBs,different UCI bit-to-constellation mapping may also be applied to eachPRB. The plurality of PRBs may be spaced apart by specific frequencyintervals.

For example, for 2-bit UCI on PF0, a combination of CS_start values andconstellations: CS={CS_start+a, CS start+3+a, CS_start+6+a,CS_start+9+a} or {CS_start+9+a, CS_start+6+a, CS_start+3+a, CS_start+a}may be applied to each PUCCH sequence repeatedly transmitted in each PRBwhile maintaining Gray coding for a bit set of {00, 01, 11, 10}, where amay be one of 0, 3, 6, and 9.

3.6. Embodiment 6

Embodiment 2 and Embodiment 3 may be combined. According to Embodiment2, a different PS value may be applied to each PRB, and according toEmbodiment 3, different UCI bit-to-constellation mapping may be appliedto each PRB. Similarly to Embodiments 4 and 5, the number of differentsequences generated by combining Embodiments 2 and 3 is much larger thanthe number of different sequences (to be mapped to PRBs) generated byonly either Embodiment 2 or Embodiment 3. Therefore, lower PAPR/CMvalues (better in terms of performance) may be obtained by combiningEmbodiments 2 and 3.

That is, in addition to multiplying a different PS value by a PUCCHsequence repeatedly transmitted over a plurality of PRBs, different UCIbit-to-constellation mapping may also be applied to each PRB. Theplurality of PRBs may be spaced apart by specific frequency intervals.

For example, for 2-bit UCI on PF0, different constellation mapping:{0+a, 3+a, 6+a, 9+a} or {9+a, 6+a, 3+a, 0+a} may be applied to eachPUCCH sequence repeatedly transmitted in each PRB while maintaining Graycoding for a bit set of {00, 01, 11, 10}. In addition, a different PSvalue may be multiplied to each PRB (or sequence). For PS values, thepattern proposed in Embodiment 2 or Embodiment 3 may be applied. Here, amay be one of 0, 3, 6, and 9.

Additional Embodiments Based on Embodiments 1 to 6

In a specific system, a combination of CS values and/or PS values may beselected and/or applied based on the results of the proposed embodiments(Embodiments 1 to 6). For example, when PUCCH format 0 of NR-U is used,each interlace (or interlace index) included in the PUCCH may consist of10 or 11 RBs. A short sequence may be repeatedly transmitted in each ofa plurality of RBs included in one interlace. The short sequence may bea length-12 computer generated sequence (CGS).

When a short sequence is repeatedly transmitted in an interlace composedof 10 RBs, Embodiment 1-2 may be applied. For example, in Embodiment1-2, if X has a value of 1, a starting CS value applied to eachRB/sequence may be set to 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 sequentiallyin order of RBs (in the PUCCH resource).

When a short sequence is repeatedly transmitted in an interlace composedof 11 RBs, Embodiment 2-1 may be applied. For example, based on the testresults of Experiment 2 of Embodiment 2-1, the top four PS patterns maybe sequentially applied in order of RBs (in the PUCCH resource). Forexample, assuming that index 421477 is applied, a PS value applied toeach RB/sequence may be set to 1, 1i, −1, 1i, −1, −1i, −1, 1i, −1, 1i,and 1 sequentially in the RB order (in the PUCCH resource).

The method in Embodiment 6 may be applied not only to the PUCCH but alsoto UL, DL and/or sidelink channels and/or signals configured in the formof an interlace consisting of 10 or 11 RBs and/or sequences.

Additionally, the experiments of each embodiment are performed based onthe 30 kHz SCS, but similar results may be obtained for other SCSs.Accordingly, each embodiment may be considered/applied regardless ofSCSs. In addition, the experiments of each embodiment are mainlyperformed based on PUCCH format 0, but similar results may be obtainedfor other PUCCH formats as well. Accordingly, each embodiment may beapplied to other PUCCH formats (e.g., PUCCH format 1, PUCCH format 4,etc.).

For example, when the 15 kHz SCS is used, the total number of PRBs mayincrease. However, when the PUCCH is actually transmitted, one interlacemay consist of 10 or 11 PRBs. In other words, one interlace may beconfigured identically for both cases when the 15 kHz SCS is used andwhen the 30 kHz SCS is used. The interval between PRBs in one interlacemay increase. Therefore, the proposed embodiments may be applied toother SCSs.

It may be further considered that additional information is loaded onthe PS pattern proposed in Embodiment 2. Since the additionalinformation is loaded on the PS pattern, this method may be used inEmbodiments 4 and 6 where the PS pattern is used. Specifically, whenspecific N PS patterns are preconfigured and/or predefined, one of the NPS patterns may be selected and applied to a UL channel and/or signal.The UL channel and/or signal may be, for example, a PUCCH. The ULchannel and/or signal may (additionally) include specific UCI with log2(N) bits. In addition, the UL channel and/or signal may (additionally)include specific UCI with ceil(log 2(N)) or floor(log 2(N)) bits. Thespecific N PS patterns may be PS patterns selected due to excellentPAPR/CM performance, for example, based on the above experiment results.As an example, HARQ-ACK information/bits may be transmitted based on CSs(or CS pattern) applied to a plurality of sequences constituting thePUCCH or QPSK/BPSK (binary phase shift keying) modulation symbols mappedto the sequences, and at the same time, SR information and/or bits maybe transmitted based on PSs (or PS pattern) applied to the plurality ofsequences constituting the corresponding PUCCH. The SR informationand/or bits may be, for example, whether a transmitted SR is positive ornegative. As another example, 2-bit information may be transmitted basedon the top four PS patterns (see FIGS. 13, 17 and 18 ) in theexperiments of the present disclosure. For example, according toExperiment 2 of Embodiment 2, the top four PS value patterns (i.e.,indices 43171, 532523, 421477, and 976621 in Experiment 2) show superiorPAPR/CM compared to other PS value patterns. Accordingly, the 2-bitinformation may be transmitted based on one or more of the four indices:indices 43171, 532523, 421477, and 976621. Further, in a specific cell,1-bit information may be transmitted based on two of the top fourindices, and in a cell adjacent to the specific cell, 1-bit informationmay be transmitted based on the remaining two indices. In this case, theadditional information may be, for example, a positive/negative SRand/or ACK/NACK feedback.

Additionally, a PS and/or CS pattern with good PAPR/CM performance maybe mapped to information that is expected to have a hightransmission/reception frequency between the UE and the BS. For example,since the transmission/reception frequency of ACK is expected to be highin the case of the HARQ A/N and the transmission/reception frequency ofnegative SR is expected to be high in the case of the SR, the PS patternwith index 43171 and/or index 532523 showing the best performance amongthe results of Experiment 2 in Embodiment 2 may be used to transmit theACK or negative SR.

As a specific example, the UE may be configured to transmitpositive/negative SR information based on PS patterns as shown in Table12.

TABLE 12 Index PS pattern Information 43171 [1, 1, 1, −1, −1, −1, 1, −1,−1, 1, −1] Positive SR 532523 [1, −1, 1, 1, −1, 1, 1, 1, −1, −1, −1]Negative SR

Hereinafter, a description will be given of how two different UEstransmit PUCCHs by applying the patterns shown in Table 12. It isassumed that PUCCH transmissions of two UEs (e.g., UE1 and UE2) aremultiplexed on the same PUCCH resource. In addition, according to theconfiguration of the BS, UE1 represents ACK/NACK with (starting) CSvalues of 0 and 6, and UE2 represents ACK/NACK with (starting) CS valuesof 3 and 9. If UE1 transmits a positive SR and UE2 transmits a negativeSR according to the example in Table 12, the PUCCH interlace structuresshown in FIG. 19 may be configured for the two UEs.

If UE1 and UE2 transmit the PUCCHs as shown in FIG. 19 , the BS may knowwhich (starting) CS values the UE1 and UE2 use to transmit the PUCCHs.The BS may perform detection based on sequences of the PUCCHstransmitted from UE1 and UE2. Thereafter, the BS may obtain PS patternvalues used by UE1 and UE2, and thus, the BS may receive additionalinformation (e.g., positive SR, negative SR, etc.).

When this method is applied, additional information may be exchanged ina new domain (i.e., PUCCH PS pattern), and thus reliability may beimproved compared to when only constellations are used as in the priorart.

Hereinafter, a power offset configuration method based on Embodiments 1to 6 will be described.

Even when different information is transmitted according to the proposedmethods in which additional information (e.g., SR information, A/Ninformation, etc.) is transmitted with a plurality of different CSpatterns, the same CS value may be used in a specific PRB included in acorresponding interlace. The method of transmitting additionalinformation with a plurality of different CS patterns is, for example,means that the additional information is transmitted by selecting and/orapplying one of the plurality of CS patterns depending on whether theinformation is a negative SR or positive SR or whether the informationis an ACK or NACK. For example, considering that SR information istransmitted with different CS patterns, when 2-bit A/N+SR aretransmitted on PUCCH format 0 (which may be referred to as enhancedPUCCH format 0) proposed in this document, a CS value used for each PRBincluded in an interlace may be determined as shown in FIG. 20 .

In FIG. 20 , an initial CS value (e.g., M0+Mcs) for the 2-bit A/N is setto {0, 3, 6, 9}={NN, NA, AA, AN}. Embodiment 1-2 is used for thenegative SR, and X is set to 1 (where X is the CS interval betweencontiguous PRBs). Embodiment 1-2 is used for the positive SR, and X isset to 7 (=1+6). In this case, 5 and 11 (=5+6) may be set instead of 1and 7 (=1+6), and the order thereof may vary. It may be seen that thesame CS value is always used in odd numbered PRB indices (i.e., PRB #1,#3, #5, #9) when NN+negative SR are transmitted (second column of FIG.20 ) and when AA+positive SR are transmitted (seventh column of FIG. 20). Thus, a slot in which 2-bit A/N and SR are transmitted (2-bit A/N+SRslot) may have poor A/N performance compared a slot in which only 2-bitA/N is transmitted (2-bit A/N only slot).

When the method of transmitting additional information (e.g., SRinformation, A/N information, etc.) with a plurality of different CSpatterns is used, if the same CS value is applied to PRBs included in aninterlace to transmit different information, a transmission power offsetmay be used for corresponding PUCCH transmission. For example, when thesame CS value is applied to half of the PRBs included in the interlaceas shown in FIG. 20 , the UE may be configured to use N dB (e.g., N=3)higher power in a slot in which 2-bit A/N and SR are transmittedtogether, compared to a slot in which only 2-bit A/N is transmitted. Asanother example, when second A/N is transmitted based on another CSpattern, power used for a 2-bit A/N only slot may be higher by N dB(e.g., N=3) than that used for an 1-bit A/N only slot.

This may be generalized as follows. When UCI is transmitted on a PUCCH,a PUCCH transmission power offset when one fixed CS pattern is appliedmay be set different from a PUCCH transmission power offset when aplurality of different CS patterns are applied (one of them is selectedand applied). For example, the offset when the UCI is transmitted on thePUCCH by applying the plurality of different CS patterns may be higherby N dB (N>0) (e.g., N=3) than the offset when the UCI is transmitted onthe PUCCH by applying the one fixed CS pattern.

Hereinafter, a method of transmitting second TB A/N information withdifferent CS patterns is described.

It may be assumed that SR information is transmitted with a plurality ofdifferent CS patterns and the BS transmits two DCIs scheduling two TBs.In this case, the UE may miss DCI scheduling the second TB. The UE mayhave initial CS mapping values as shown in Table 13. In Table 13, thetwo letters before ‘+’ indicate whether the first TB and the second TBare A/N, respectively, and Pos/Neg after ‘+’ indicates the type of SR.For example, “NA+Neg” in Table 13 means that the first TB is NACK, thesecond TB is ACK, and the SR is negative. Similarly, “AN+Pos” means thatthe first TB is ACK, the second TB is NACK, and the SR is positive.

TABLE 13 Initial CS mapping UCI combination CS pattern 0 3 6 9 2 bitA/N + SR X = 1    NN + Neg NA + Neg AA + Neg AN + Neg X = 1 + 6 NN +Pos  NA + Pos  AA + Pos  AN + Pos  1 bit A/N + SR X = 1     N + Neg  A +Neg X = 1 + 6  N + Pos  A + Pos

When the UE fails to receive the DCI scheduling the second TB, if the UEknows that the reception result of the first TB is ACK and intends totransmit a negative SR, the UE selects a CS pattern of 1 and an initialCS value of 6. In this case, since the BS assumes that the correspondingUE has received both TBs, the BS may determine that the second TB is ACK(the UE has normally received the second TB). Eventually, N-to-A error(strictly, DTX-to-A error) occurs.

To solve this problem, the following two methods are proposed.

Proposed Method 1: Mapping based on Table 14 on the assumption of 2-bitA/N (in the case of 1-bit A/N, a second bit is regarded as NACK from theperspective of the UE)

TABLE 14 Initial CS mapping UCI combination CS pattern 0 3 6 9 2 bitA/N + SR X = 1    NN + Neg NA + Neg AA + Neg AN + Neg X = 1 + 6 NN +Pos  NA + Pos  AA + Pos  AN + Pos  1 bit A/N + SR X = 1     N + Neg  A +Neg X = 1 + 6  N + Pos  A + Pos

When the UE transmits 1-bit-A/N, the second bit may always be regardedas NACK as shown in Table 14. According to this mapping, the BS mayalways recognize the second TB as NACK when the UE transmits only theresult for the first TB. Thus, the risk of N-to-A error (or DTX-to-Aerror) may be removed.

As another method, the N-to-A error (or DTX-to-ACK error) may be handledby modifying the 2-bit A/N mapping as shown in Table 15.

TABLE 15 Initial CS mapping UCI combination CS pattern 0 3 6 9 2 bitA/N + SR X = 1    NN + Neg NA + Neg AN + Neg AA + Neg X = 1 + 6 NN +Pos  NA + Pos  AN + Pos  AA + Pos  1 bit A/N + SR X = 1     N + Neg  A +Neg X = 1 + 6  N + Pos  A + Pos

Proposed Method 2: Mapping and transmitting A/N for second TB withdifferent CS patterns as shown in Table 16

TABLE 16 Initial CS mapping UCI combination CS pattern 0 3 6 9 2 bitA/N + SR X = 1    NN + Neg NN + Pos AN + Neg AN + Pos X = 1 + 6 NA + NegNA + Pos AA + Neg AA + Pos 1 bit A/N + SR X = 1     N + Neg  N + Pos A + Neg  A + Pos X = 1 + 6

As shown in Table 16, the UE may use the same CS pattern and differentinitial CS values when transmitting 1-bit A/N+SR, and the UE may usedifferent CS patterns when transmitting A/N for the second TB. Accordingto this mapping, when the UE transmits only the results for the firstTB, the BS may always recognize the second TB as NACK. Thus, the risk ofN-to-A error (or DTX-to-A error) may be removed.

In addition, a method of configuring 1-bit A/N+SR as shown in Table 15has an advantage that compatibility with methods used in theconventional system is maintained. Proposed Method 2 may also berepresented as shown in Table 17.

TABLE 17 UCI combination Initial CS mapping CS pattern mapping (e.g., X= 1) 2-bit A/N + SR {0, 3, 6, 9} = {X, X + 6} = {N, A} {N + Neg, N +Pos, A + Neg, A + Pos} Note: A/N denotes ACK and Note: A/N denotes ACKand NACK NACK for second TB for first TB 1-bit A/N + SR {0, 3, 6, 9} =Fixed to X {N + Neg, N + Pos, A + Neg, A + Pos} Note: A/N denotes ACKand NACK for first TB

Hereinafter, a method of using different CS patterns in a slot in whichonly an SR is transmitted (SR only slot) will be described.

Different CS patterns (or different PS patterns) may be used for PUCCHtransmission where only SR information is transmitted. As an example,the BS may assign the same initial CS value to one UE for the SRinformation transmission. The BS may instruct the UE to transmit aspecific SR (process or index) (separately configured by higher layers)based on X=1 and transmit another SR (process or index) based on X=7(=1+6). As another example, the BS may assign the same initial CS valueto a plurality of UEs (e.g., two UEs: UE1 and UE2) for the SRinformation transmission. The BS may instruct UE1 to transmit the SRbased on X=1 and transmit the SR based on X=7 (=1+6).

According to the above method, there is an advantage in that the PUCCHresource capacity or UE multiplexing capacity for SR transmissionincreases, compared to when SR information is transmitted based on onlythe initial CS value. For example, if the number of different CSsavailable for the same initial CS value is N, the PUCCH resourcecapacity or UE multiplexing capacity may be doubled, so that 2N PUCCHresources and UEs may be supported.

In the above proposed methods, transmission of different informationwith different CS patterns may be modified into transmission ofdifferent information with different PS patterns. In addition, althoughthe value of X is assumed to be 1 for convenience of description, X maybe one of the coprime integers of 12 such as 1, 5, 7, 11, etc.

3.7. Embodiment 7

In Embodiments 1 to 6, methods in which a plurality of short sequences,each having a length of one RB, are repeatedly transmitted based on aninterlace structure for a single PUCCH have been described. InEmbodiment 7, a method of dividing a single long sequence, which has alength equivalent to the total number of REs corresponding to (orincluded in) a plurality of PRBs (e.g., N PRBs) constituting aninterlace for a single PUCCH, into N parts (by 12 REs) and mapping andtransmitting the PUCCH to each of the N PRBs will be described.

As an example, if the total number of PRBs included in a specificinterlace is 10, the total number of REs included in the specificinterlace is 10 (PRBs)*12 (subcarriers per PRB)=120. In this case, thelength of a Zadoff-Chu (ZC) sequence is determined as the largest primenumber less than or equal to 120. Since the largest prime number lessthan or equal to 120 is 113, the length of the ZC sequence may be 113.The remaining 7 REs may be configured to have the same values as thefirst part of the length-113 sequence. In other words, the CS may beapplied. For example, when a set of 113 elements constituting thelength-113 sequence is defined as follows: {e1, e2, . . . , e113}, thelength-120 sequence may be defined as follows: {e1, e2, . . . , e113,e1, e2, . . . , e7} by copying and concatenating the first 7 elements tothe end of the length-113 sequence. The length-120 sequence is dividedinto 10 parts, and each part is mapped to each PRB by 12 REs to performPUCCH transmission.

As another example, if the total number of PRBs is 11, the total numberof REs included in a specific interlace is 11 (PRBs)*12 (subcarriers perPRB)=132. In this case, the length of a ZC sequence is determined as thelargest prime number less than or equal to 132. Since the largest primenumber less than or equal to 132 is 131, the length of the ZC sequencemay be 131. The remaining one RE may be configured to have the samevalue as the first part of the length-131 sequence. In other words, theCS may be applied. For example, when a set of 131 elements constitutingthe length-131 sequence is defined as follows: {e1, e2, . . . , e131},the length-132 sequence may be defined as follows: {e1, e2, . . . ,e131, e1} by copying and concatenating the first one element to the endof the length-131 sequence. The length-132 sequence is divided into 11parts, and each part is mapped to each PRB by 12 REs to perform PUCCHtransmission

When a PUCCH sequence is generated for U-band operation according toEmbodiment 7, the PUCCH needs to be designed to have good PAPR/CMperformance because the PUCCH is a UL channel transmitted by the UE.Therefore, the following method may be applied to improve the PAPR/CMperformance.

Embodiment 7-1: Instead of using the largest prime number less than orequal to the total number of REs to which the PUCCH is mapped as thesequence length, a prime number with good PAPR/CM performance amongprime numbers less than or equal to the total number of REs to which thePUCCH is mapped is used as the sequence length.

As an example, when the total number of PRBs included in a specificinterlace is 11 (that is, when the total number of REs is 132), thePAPR/CM performance may be obtained as shown in FIG. 21 .

Referring to FIG. 21 , it may be seen that prime numbers whose theresults of modulo 12 operation are 5 (and/or 7) have good PAPR/CMperformance. Accordingly, the prime numbers whose the results of modulo12 operation are 5 (and/or 7) may be selected as the sequence length.

Specifically, when the total number of PRBs included in the specificinterlace is 11, the sequence length may be set to 127, 113, 103, 101,89, etc.

As another example, when the total number of PRBs included in a specificinterlace is 10 (that is, when the total number of REs is 120), thePAPR/CM performance may be obtained as shown in FIG. 22 .

Referring to FIG. 22 , it may be seen that prime numbers whose theresults of modulo 12 operation are 5 (and/or 7) have good PAPR/CMperformance. Accordingly, the prime numbers whose the results of modulo12 operation are 5 (and/or 7) may be selected as the sequence length.

Specifically, when the total number of PRBs included in the specificinterlace is 10, the sequence length may be set to 113, 103, 101, 89,79, etc.

Embodiment 7-1 may be generalized as follows. When a prime number isless than or equal to the total number of REs included in a specificinterlace and when the result of modulo 12 operation thereof is 5(and/or 7), the prime number may be selected as the sequence length. ThePUCCH sequence may be generated and/or transmitted according to theselected length.

Prime numbers greater than 30 and less than 132 and having the resultsof modulo 12 operation equal to 5 or 7 are listed as follows: 127, 113,103, 101, 89, 79, 67, 53, 43, 41, and 31. The listed values may be usedas the length of the PUCCH sequence.

Embodiment 7-2: The basic idea of Embodiment 7-2 follows Embodiment 7-1.However, to further reduce specification work, the same PUCCH sequencelength may be configured even when the total number of PRBs included ina specific interlace is different (e.g., 11 RBs and 10 RBs).

As an example, the sequence length may be set to 113 (or 103) for bothcases: when the total number of PRBs included in a specific interlace is11 (that is, when the total number of REs is 132) and when the totalnumber of PRBs included in a specific interlace is 10 (that is, when thetotal number of REs is 120).

As another example, the sequence length may be set to 103 (or 101) forboth cases: when the total number of PRBs included in a specificinterlace is 10 (that is, when the total number of REs is 120) and whenthe total number of PRBs included in a specific interlace is 9 (that is,when the total number of REs is 108).

The specification work may be simplified due to use of one sequencelength, and the PAPR/CM performance may be guaranteed.

Embodiment 7-2 may be modified as follows: For an interlace having alarger total number of PRBs, a length-a PUCCH sequence may be firstgenerated. Then, for an interlace where the total number of PRBs is lessby n than the above interlace, n RBs may be punctured from the length-asequence (as many as the difference in the total number of PRBs includedin each interlace), and the rest of the sequence may be used.

As an example, for an interlace including a total of 11 RBs, a PUCCHsequence may be generated to have a sequence length of 113 (or 103) (bycyclic shifting). Then, for an interlace including 10 RBs, the last oneRB may be punctured from the length-113 PUCCH sequence, and theremaining sequence may be used.

As another example, for an interlace including a total of 10 RBs, aPUCCH sequence may be generated to have a sequence length of 103 (or101) (by cyclic shifting). Then, for an interlace including 9 RBs, thelast one RB may be punctured from the length-103 PUCCH sequence, and theremaining sequence may be used.

As a further example, for an interlace including a total of 11 RBs, aPUCCH sequence may be generated to have a sequence length of 103 (or101) (by cyclic shifting). Then, for an interlace including 10 RBs, thelast one RB may be punctured from the length-103 PUCCH sequence, and theremaining sequence may be used. For an interlace including 9 RBs, thelast two RBs may be punctured from the length-103 PUCCH sequence, andthe remaining sequence may be used.

When the total number of PRBs included in a specific interlace is 9(that is, when the total number of REs is 108), the PAPR/CM performancemay be obtained as shown in FIG. 23 .

Additionally, the method of configuring multiple sequences proposedabove is not limited when a PUCCH signal is configured. That is, theprinciples/methods proposed in the present disclosure may be appliedequally/similarly when one UL channel/signal (e.g., DMRS signal used forPUSCH demodulation, DMRS used for PUCCH demodulation, PRACH preamble,and SRS sequence) is configured with a plurality of sequences.

Additionally, when a single channel (e.g., PUCCH) and/or a single signal(e.g., DMRS) is configured with a single sequence, different CSs and/orPSs (or combinations thereof) may be applied to a plurality ofchannels/signals (or sequences configured therefor) may be applied. Thatis, one UE may be configured to simultaneously transmit the plurality ofchannels/signals (or sequences configured therefor) to which thedifferent CSs and/or PSs (or combinations thereof) are applied (at thesame time).

In addition, although the embodiments of the present disclosure havebeen described based on UL, the embodiments may be applied when anychannel/signal is repeatedly transmitted in the frequency domain even inDL situations. For example, when frequency division multiplexing (FDM)is applied to a wake-up signal (WUS) sequence (for a specific purposesuch as UE grouping) in eMTC/NB-IoT, the embodiments of the presentdisclosure may be applied. Since the WUS is transmitted in DL (BS→UE),the transmitter and receiver are reversed compared to the PUCCHtransmission described above. Accordingly, the BS may perform theoperations described as being performed by the UE in the embodiments ofthe present disclosure, and the UE may perform the operations describedas being performed by the BS.

In addition, when a sequence used for UE-to-UE communication (e.g. D2Dcommunication) and/or vehicle-to-vehicle communication (e.g. V2Xcommunication) based on sidelink (SL) or a channel (e.g. feedbackchannel) and/or a signal (e.g. DMRS) configured with such a sequence isconfigured/mapped/transmitted, the principles/operations/methods in theembodiments of the present disclosure may be applied equally/similarly.

Although the embodiments of the present disclosure have been describedbased on the CGS, the embodiments may be applied when a general sequenceis used. For example, when the base sequence is an M-sequence, theembodiments of the present disclosure may be applied by changing theinitial value of a linear feedback shift register (LFSR) instead ofchanging the root index of a ZC sequence. The methods proposed in theembodiments are applicable when the M-sequence is cyclic shifted.

It is obvious that each of the examples of the proposed methods may alsobe included as one implementation method, and thus each example may beregarded as a kind of proposed method. Although the proposed methods maybe implemented independently, some of the proposed methods may becombined (or merged) for implementation. In addition, it may beregulated that information on whether the proposed methods are applied(or information on rules related to the proposed methods) should betransmitted from a BS to a UE through a predefined signal (e.g., aphysical layer signal, a higher layer signal, etc.).

The above-described generation of a pseudo-random sequence and alow-PAPR sequence based on the M-sequence may be performed withreference to Table 18, Table 19, and the operations defined in 3GPP TS38.211.

[Table 18]

5.2.1 Pseudo-Random Sequence Generation

Generic pseudo-random sequences are defined by a length-31 Goldsequence. The output sequence c(n) of length M_(PN), where n=0,1, . . ., M_(PN)−1, is defined by

c(n)=(x ₁(n+N _(C))+x ₂(n+N _(C)))mod 2

x ₁(n+31)=(x ₁(n+3)+x ₁(n))mod 2

x ₂(n+31)=(x ₂(n+3)+x ₂(n+2)+x ₂(n+1)+x ₂(n))mod 2

where N_(C)=1600 and the first m-sequence x₁(n) shall be initializedwith x₁(0)=1, x₁(n)=0, n=1, 2, . . . , 30. The initialization of thesecond m-sequence, □₂(□), is denoted by c_(init)=Σ_(i=0) ³⁰x₂(i)·2^(i)with the value depending on the application of the sequence.

[Table 19]

5.2.2 Low-PAPR Sequence Generation Type 1

The low-PAPR sequence r_(u,v) ^((α,δ))(n) is defined by a cyclic shift aof a base sequence r _(u,v)(n) according to

r _(u,v) ^((α,δ))(n)=e ^(jαn) r _(u,v)(n), 0≤n≤M _(ZC)

where M_(ZC)=mN_(sc) ^(RB)/2^(δ) is the length of the sequence. Multiplesequences are defined from a single base sequence through differentvalues of α and δ.

Base sequences r _(u,v)(n) are divided into groups, where u={0,1, . . ., 29} is the group number and v is the base sequence number within thegroup, such that each group contains one base sequence (v=0) of eachlength M_(ZC)=mN_(sc) ^(RB)/2^(δ), for 1/2≤m/2^(δ)≤5, and two basesequences (v=0,1) of each length M_(ZC)=mN_(sc) ^(RB)/2^(δ), for6≤m/2^(δ). The definition of the base sequence r _(u,v)(0), . . . , r_(u,v)(M_(ZC)−1) depends on the sequence length M_(ZC).

5.2.2.1 Base Sequences of Length 36 or Larger

For M_(ZC)≥3N_(sc) ^(RB), the base sequence r _(u,v)(0), . . . , r_(u,v)(M_(ZC)−1) is given by

${{\overset{\_}{r}}_{u,v} = {x_{q}\left( {n{{mod}N}_{ZC}} \right)}}{{x_{q}(m)} = e^{{- j}\frac{{\pi{qm}}({m + 1})}{N_{ZC}}}}{where}{q = {\left\lfloor {\overset{\_}{q} + \frac{1}{2}} \right\rfloor + {v \cdot \left( {- 1} \right)^{\lfloor{2\overset{\_}{q}{{rf}}}}}}}{\overset{\_}{q} = {{N_{ZC} \cdot \left( {u + 1} \right)}/31}}$

The length N_(ZC) is given by the largest prime number such thatN_(ZC)<M_(ZC).

5.2.2.2 Base Sequences of Length Less than 36

For M_(ZC) ∈ {6, 12, 18, 24}, the base sequence is given by

r _(u,v)(n)=e ^(jφ(n)π/4), 0≤n≤M _(ZC)−1

where the value of φ(n) is given by Tables 5.2.2.2-1 to 5.2.2.2-4.

Network Access and Communication Process

The UE may perform a network access process to perform theabove-described/proposed procedures and/or methods. For example, the UEmay receive and store system information and configuration informationrequired to perform the above-described/proposed procedures and/ormethods during network access (e.g., BS access). The configurationinformation required for the present disclosure may be received byhigher-layer signaling (e.g., RRC signaling or MAC-layer signaling).

FIG. 24 is a diagram illustrating an initial network access andsubsequent communication process. In NR, a physical channel and an RSmay be transmitted by beamforming. When beamforming-based signaltransmission is supported, beam management may follow, for beamalignment between a BS and a UE. Further, a signal proposed by thepresent disclosure may be transmitted/received by beamforming. InRRC_IDLE mode, beam alignment may be performed based on an SSB, whereasin RRC_CONNECTED mode, beam alignment may be performed based on a CSI-RS(in DL) and an SRS (in UL). On the contrary, when beamforming-basedsignal transmission is not supported, beam-related operations in thefollowing description may be skipped.

Referring to FIG. 24 , a BS (e.g., eNB) may periodically transmit an SSB(S702). The SSB includes a PSS/SSS/PBCH. The SSB may be transmitted bybeam sweeping (see FIG. D5 ). The PBCH may include a master informationblock (MSB), and the MIB may include scheduling information forremaining minimum system information (RMSI). The BS may then transmitthe RMSI and other system information (OSI) (S704). The RMSI may includeinformation required for initial access to the BS (e.g., PRACHconfiguration information). After detecting SSBs, the UE identifies thebest SSB. The UE may then transmit an RACH preamble (Message 1; Msg1) inPRACH resources linked/corresponding to the index (i.e., beam) of thebest SSB (S706). The beam direction of the RACH preamble is associatedwith the PRACH resources. Association between PRACH resources (and/orRACH preambles) and SSBs (SSB indexes) may be configured by systeminformation (e.g., RMSI). Subsequently, in an RACH procedure, the BS maytransmit a random access response (RAR) (Msg2) in response to the RACHpreamble (S708), the UE may transmit Msg3 (e.g., RRC Connection Request)based on a UL grant included in the RAR (S710), and the BS may transmita contention resolution message (Msg4) (S720). Msg4 may include RRCConnection Setup.

When an RRC connection is established between the BS and the UE in theRACH procedure, beam alignment may subsequently be performed based on anSSB/CSI-RS (in DL) and an SRS (in UL). For example, the UE may receivean SSB/CSI-RS (S714). The SSB/CSI-RS may be used for the UE to generatea beam/CSI report. The BS may request the UE to transmit a beam/CSIreport, by DCI (S716). In this case, the UE may generate a beam/CSIreport based on the SSB/CSI-RS and transmit the generated beam/CSIreport to the BS on a PUSCH/PUCCH (S718). The beam/CSI report mayinclude a beam measurement result, information about a preferred beam,and so on. The BS and the UE may switch beams based on the beam/CSIreport (S720 a and S720 b).

Subsequently, the UE and the BS may perform the above-described/proposedprocedures and/or methods. For example, the UE and the BS may transmit awireless signal by processing information stored in a memory or mayprocess a received wireless signal and store the processed signal in amemory according to the proposal of the present disclosure, based onconfiguration information obtained in a network access process (e.g., asystem information acquisition process, an RRC connection process on anRACH, and so on). The wireless signal may include at least one of aPDCCH, a PDSCH, or an RS on DL and at least one of a PUCCH, a PUSCH, oran SRS on UL.

Implementation Examples

FIG. 25 is a flowchart illustrating a signal transmission/receptionmethod according to embodiments of the present disclosure.

Referring to FIG. 25 , the embodiments of the present disclosure may beperformed by a UE. The embodiments of the present disclosure mayinclude: repeatedly mapping a PUCCH sequence to each RB in an interlace(S2501); and transmitting a PUCCH including the PUCCH sequence in theinterlace (S2503).

Specifically, to transmit the PUCCH sequence in the interlace, a CSvalue may change for each RB, a PS value may change for each RB, and/orUCI bit-to-constellation mapping may be applied to each RB as describedabove in Embodiments 1 to 6.

For example, the PS value of the PUCCH sequence for each RB may varydepending on the RB index of each RB as described above in Embodiment 2of the present disclosure. Specifically, the PS value may be determinedby a specific pattern to have a value for each RB. The specific patternmay be determined in such a manner that the PS value of an RB with thelowest index in the interlace is fixed to 1 and the PS values to beapplied to the remaining RBs in the interlace are selected based on aPAPR and a CM. When the number of PRBs included in the interlace is 10,at least one of the patterns shown in FIGS. 12, 15, and 17 may be used.When the number of PRBs included in the interlace is 11, at least one ofthe patterns shown in FIGS. 13, 16, and 18 may be used.

As described above, the RB index of each RB may be a logical RB indexwithin the interlace in which the PUCCH is transmitted, rather than anindex assigned in consideration of the active BWP or the entirebandwidth. The RB index is sequentially assigned to each RB based on thefrequency positions of the RBs in the interlace. For example, when thenumber of RBs included in the interlace is 11, RB indices from 0 to 10may be assigned to the 11 RBs based on the frequency positions. When thenumber of RBs included in the interlace is 10, RB indices from 0 to 9may be assigned to the 10 RBs based on the frequency positions.

Although only the PS value of the PUCCH sequence may vary for each RB,the CS value may also vary together with the PS value. The CS value maychange according to Embodiment 1 and/or 4. For example, each CS valuemay be applied to each RB, and each CS value may vary depending on theRB index of each RB.

For example, the CS value of the PUCCH sequence may change for each RBbased on the value of m_(int) determined by multiplying the RB index ofeach RB by the value of X (or the value of X) as described in Embodiment1-2 of the present disclosure.

Referring to Table 11, when the value of Δ is 1, 2, or 5, the PUCCHtransmission performance increases. In particular, when the value of Δis 5, the best PUCCH transmission performance is obtained, so the valueof Δ may be 5.

A modulo operation may be performed on the value of m_(int) determinedby multiplying the RB index of each RB by the value of Δ (or the valueof X) and a sequence length L (or the number of subcarriers for each RB,which is the same as the sequence length L). Alternatively, the modulooperation may be performed on a value obtained by adding factors usedfor conventional CS derivation to the value of m_(int) and the sequencelength L.

In addition to the operations described with reference to FIG. 25 , oneor more of the operations described with reference to FIGS. 1 to 24and/or the operations described in Embodiments 1 to 7 may be combinedand additionally performed. As an example, the UE may perform UL LBTbefore transmitting the PUCCH. As another example, the UE may operateaccording to one or more of the methods described in Embodiments 1 to 5when a single PUSCH and/or multiple PUSCHs are scheduled.

Example of Communication System to which the Present Disclosure isApplied

The various descriptions, functions, procedures, proposals, methods,and/or operation flowcharts of the present disclosure described hereinmay be applied to, but not limited to, various fields requiring wirelesscommunication/connectivity (e.g., 5G) between devices.

More specific examples will be described below with reference to thedrawings. In the following drawings/description, like reference numeralsdenote the same or corresponding hardware blocks, software blocks, orfunction blocks, unless otherwise specified.

FIG. 26 illustrates a communication system 1 applied to the presentdisclosure.

Referring to FIG. 26 , the communication system 1 applied to the presentdisclosure includes wireless devices, BSs, and a network. A wirelessdevice is a device performing communication using radio accesstechnology (RAT) (e.g., 5G NR (or New RAT) or LTE), also referred to asa communication/radio/5G device. The wireless devices may include, notlimited to, a robot 100 a, vehicles 100 b-1 and 100 b-2, an extendedreality (XR) device 100 c, a hand-held device 100 d, a home appliance100 e, an IoT device 100 f, and an artificial intelligence (AI)device/server 400. For example, the vehicles may include a vehiclehaving a wireless communication function, an autonomous driving vehicle,and a vehicle capable of vehicle-to-vehicle (V2V) communication. Herein,the vehicles may include an unmanned aerial vehicle (UAV) (e.g., adrone). The XR device may include an augmented reality (AR)/virtualreality (VR)/mixed reality (MR) device and may be implemented in theform of a head-mounted device (HIVID), a head-up display (HUD) mountedin a vehicle, a television (TV), a smartphone, a computer, a wearabledevice, a home appliance, a digital signage, a vehicle, a robot, and soon. The hand-held device may include a smartphone, a smart pad, awearable device (e.g., a smart watch or smart glasses), and a computer(e.g., a laptop). The home appliance may include a TV, a refrigerator, awashing machine, and so on. The IoT device may include a sensor, a smartmeter, and so on. For example, the BSs and the network may beimplemented as wireless devices, and a specific wireless device 200 amay operate as a BS/network node for other wireless devices.

The wireless devices 100 a to 100 f may be connected to the network 300via the BSs 200. An AI technology may be applied to the wireless devices100 a to 100 f, and the wireless devices 100 a to 100 f may be connectedto the AI server 400 via the network 300. The network 300 may beconfigured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g.,NR) network. Although the wireless devices 100 a to 100 f maycommunicate with each other through the BSs 200/network 300, thewireless devices 100 a to 100 f may perform direct communication (e.g.,sidelink communication) with each other without intervention of theBSs/network. For example, the vehicles 100 b-1 and 100 b-2 may performdirect communication (e.g., V2V/vehicle-to-everything (V2X)communication). The IoT device (e.g., a sensor) may perform directcommunication with other IoT devices (e.g., sensors) or other wirelessdevices 100 a to 100 f.

Wireless communication/connections 150 a, 150 b, and 150 c may beestablished between the wireless devices 100 a to 100 f/BS 200 andbetween the BSs 200. Herein, the wireless communication/connections maybe established through various RATs (e.g., 5G NR) such as UL/DLcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter-BS communication (e.g., relay or integratedaccess backhaul (IAB)). Wireless signals may be transmitted and receivedbetween the wireless devices, between the wireless devices and the BSs,and between the BSs through the wireless communication/connections 150a, 150 b, and 150 c. For example, signals may be transmitted and receivedon various physical channels through the wirelesscommunication/connections 150 a, 150 b and 150 c. To this end, at leasta part of various configuration information configuring processes,various signal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocation processes, for transmitting/receiving wireless signals, maybe performed based on the various proposals of the present disclosure.

Example of Wireless Device to which the Present Disclosure is Applied

FIG. 27 illustrates wireless devices applicable to the presentdisclosure.

Referring to FIG. 27 , a first wireless device 100 and a second wirelessdevice 200 may transmit wireless signals through a variety of RATs(e.g., LTE and NR). {The first wireless device 100 and the secondwireless device 200} may correspond to {the wireless device 100 x andthe BS 200} and/or {the wireless device 100 x and the wireless device100 x} of FIG. 26 .

The first wireless device 100 may include one or more processors 102 andone or more memories 104, and further include one or more transceivers106 and/or one or more antennas 108. The processor(s) 102 may controlthe memory(s) 104 and/or the transceiver(s) 106 and may be configured toimplement the descriptions, functions, procedures, proposals, methods,and/or operation flowcharts disclosed in this document. For example, theprocessor(s) 102 may process information in the memory(s) 104 togenerate first information/signals and then transmit wireless signalsincluding the first information/signals through the transceiver(s) 106.The processor(s) 102 may receive wireless signals including secondinformation/signals through the transceiver(s) 106 and then storeinformation obtained by processing the second information/signals in thememory(s) 104. The memory(s) 104 may be connected to the processor(s)102 and may store various pieces of information related to operations ofthe processor(s) 102. For example, the memory(s) 104 may store softwarecode including instructions for performing all or a part of processescontrolled by the processor(s) 102 or for performing the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document. The processor(s) 102 and the memory(s) 104may be a part of a communication modem/circuit/chip designed toimplement RAT (e.g., LTE or NR). The transceiver(s) 106 may be connectedto the processor(s) 102 and transmit and/or receive wireless signalsthrough the one or more antennas 108. Each of the transceiver(s) 106 mayinclude a transmitter and/or a receiver. The transceiver(s) 106 may beinterchangeably used with radio frequency (RF) unit(s). In the presentdisclosure, the wireless device may be a communicationmodem/circuit/chip.

The second wireless device 200 may include one or more processors 202and one or more memories 204, and further include one or moretransceivers 206 and/or one or more antennas 208. The processor(s) 202may control the memory(s) 204 and/or the transceiver(s) 206 and may beconfigured to implement the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process information inthe memory(s) 204 to generate third information/signals and thentransmit wireless signals including the third information/signalsthrough the transceiver(s) 206. The processor(s) 202 may receivewireless signals including fourth information/signals through thetransceiver(s) 106 and then store information obtained by processing thefourth information/signals in the memory(s) 204. The memory(s) 204 maybe connected to the processor(s) 202 and store various pieces ofinformation related to operations of the processor(s) 202. For example,the memory(s) 204 may store software code including instructions forperforming all or a part of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operation flowcharts disclosed in this document. Theprocessor(s) 202 and the memory(s) 204 may be a part of a communicationmodem/circuit/chip designed to implement RAT (e.g., LTE or NR). Thetransceiver(s) 206 may be connected to the processor(s) 202 and transmitand/or receive wireless signals through the one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may be acommunication modem/circuit/chip.

Now, hardware elements of the wireless devices 100 and 200 will bedescribed in greater detail. One or more protocol layers may beimplemented by, not limited to, one or more processors 102 and 202. Forexample, the one or more processors 102 and 202 may implement one ormore layers (e.g., functional layers such as physical (PHY), mediumaccess control (MAC), radio link control (RLC), packet data convergenceprotocol (PDCP), RRC, and service data adaptation protocol (SDAP)). Theone or more processors 102 and 202 may generate one or more protocoldata units (PDUs) and/or one or more service data Units (SDUs) accordingto the descriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document. The one or moreprocessors 102 and 202 may generate messages, control information, data,or information according to the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument and provide the messages, control information, data, orinformation to one or more transceivers 106 and 206. The one or moreprocessors 102 and 202 may generate signals (e.g., baseband signals)including PDUs, SDUs, messages, control information, data, orinformation according to the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument and provide the generated signals to the one or moretransceivers 106 and 206. The one or more processors 102 and 202 mayreceive the signals (e.g., baseband signals) from the one or moretransceivers 106 and 206 and acquire the PDUs, SDUs, messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. For example, one or moreapplication specific integrated circuits (ASICs), one or more digitalsignal processors (DSPs), one or more digital signal processing devices(DSPDs), one or more programmable logic devices (PLDs), or one or morefield programmable gate arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument may be implemented using firmware or software, and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or may be stored in the one or more memories 104 and 204 andexecuted by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, an instruction, and/or a set of instructions.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured to includeread-only memories (ROMs), random access memories (RAMs), electricallyerasable programmable read-only memories (EPROMs), flash memories, harddrives, registers, cash memories, computer-readable storage media,and/or combinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or wireless signals/channels, mentioned in the methodsand/or operation flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or wireless signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document, from one or more otherdevices. For example, the one or more transceivers 106 and 206 may beconnected to the one or more processors 102 and 202 and transmit andreceive wireless signals. For example, the one or more processors 102and 202 may perform control so that the one or more transceivers 106 and206 may transmit user data, control information, or wireless signals toone or more other devices. The one or more processors 102 and 202 mayperform control so that the one or more transceivers 106 and 206 mayreceive user data, control information, or wireless signals from one ormore other devices. The one or more transceivers 106 and 206 may beconnected to the one or more antennas 108 and 208 and the one or moretransceivers 106 and 206 may be configured to transmit and receive userdata, control information, and/or wireless signals/channels, mentionedin the descriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document, through the one or moreantennas 108 and 208. In this document, the one or more antennas may bea plurality of physical antennas or a plurality of logical antennas(e.g., antenna ports). The one or more transceivers 106 and 206 mayconvert received wireless signals/channels from RF band signals intobaseband signals in order to process received user data, controlinformation, and wireless signals/channels using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, and wirelesssignals/channels processed using the one or more processors 102 and 202from the baseband signals into the RF band signals. To this end, the oneor more transceivers 106 and 206 may include (analog) oscillators and/orfilters.

Example of Use of Wireless Device to which the Present Disclosure isApplied

FIG. 28 illustrates another example of a wireless device applied to thepresent disclosure. The wireless device may be implemented in variousforms according to a use case/service (refer to FIG. 26 ).

Referring to FIG. 28 , wireless devices 100 and 200 may correspond tothe wireless devices 100 and 200 of FIG. 27 and may be configured toinclude various elements, components, units/portions, and/or modules.For example, each of the wireless devices 100 and 200 may include acommunication unit 110, a control unit 120, a memory unit 130, andadditional components 140. The communication unit 110 may include acommunication circuit 112 and transceiver(s) 114. For example, thecommunication circuit 112 may include the one or more processors 102 and202 and/or the one or more memories 104 and 204 of FIG. 27 . Forexample, the transceiver(s) 114 may include the one or more transceivers106 and 206 and/or the one or more antennas 108 and 208 of FIG. 27 . Thecontrol unit 120 is electrically connected to the communication unit110, the memory 130, and the additional components 140 and providesoverall control to the wireless device. For example, the control unit120 may control an electric/mechanical operation of the wireless devicebased on programs/code/instructions/information stored in the memoryunit 130. The control unit 120 may transmit the information stored inthe memory unit 130 to the outside (e.g., other communication devices)via the communication unit 110 through a wireless/wired interface orstore, in the memory unit 130, information received through thewireless/wired interface from the outside (e.g., other communicationdevices) via the communication unit 110.

The additional components 140 may be configured in various mannersaccording to type of the wireless device. For example, the additionalcomponents 140 may include at least one of a power unit/battery,input/output (I/O) unit, a driving unit, and a computing unit. Thewireless device may be implemented in the form of, not limited to, therobot (100 a of FIG. 19 ), the vehicles (100 b-1 and 100 b-2 of FIG. 26), the XR device (100 c of FIG. 26 ), the hand-held device (100 d ofFIG. 26 ), the home appliance (100 e of FIG. 26 ), the IoT device (100 fof FIG. 26 ), a digital broadcasting terminal, a hologram device, apublic safety device, an MTC device, a medical device, a FinTech device(or a finance device), a security device, a climate/environment device,the AI server/device (400 of FIG. 26 ), the BSs (200 of FIG. 26 ), anetwork node, or the like. The wireless device may be mobile or fixedaccording to a use case/service.

In FIG. 28 , all of the various elements, components, units/portions,and/or modules in the wireless devices 100 and 200 may be connected toeach other through a wired interface or at least a part thereof may bewirelessly connected through the communication unit 110. For example, ineach of the wireless devices 100 and 200, the control unit 120 and thecommunication unit 110 may be connected by wire and the control unit 120and first units (e.g., 130 and 140) may be wirelessly connected throughthe communication unit 110. Each element, component, unit/portion,and/or module in the wireless devices 100 and 200 may further includeone or more elements. For example, the control unit 120 may beconfigured with a set of one or more processors. For example, thecontrol unit 120 may be configured with a set of a communication controlprocessor, an application processor, an electronic control unit (ECU), agraphical processing unit, and a memory control processor. In anotherexample, the memory 130 may be configured with a RAM, a dynamic RAM(DRAM), a ROM, a flash memory, a volatile memory, a non-volatile memory,and/or a combination thereof.

Example of Vehicle or Autonomous Driving Vehicle to which the PresentDisclosure is Applied

FIG. 29 illustrates a vehicle or an autonomous driving vehicle appliedto the present disclosure. The vehicle or autonomous driving vehicle maybe implemented as a mobile robot, a car, a train, a manned/unmannedaerial vehicle (AV), a ship, or the like.

Referring to FIG. 29 , a vehicle or autonomous driving vehicle 100 mayinclude an antenna unit 108, a communication unit 110, a control unit120, a driving unit 140 a, a power supply unit 140 b, a sensor unit 140c, and an autonomous driving unit 140 d. The antenna unit 108 may beconfigured as a part of the communication unit 110. The blocks110/130/140 a to 140 d correspond to the blocks 110/130/140 of FIG. 28 ,respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from external devices such as othervehicles, BSs (e.g., gNBs and road side units), and servers. The controlunit 120 may perform various operations by controlling elements of thevehicle or the autonomous driving vehicle 100. The control unit 120 mayinclude an ECU. The driving unit 140 a may enable the vehicle or theautonomous driving vehicle 100 to drive on a road. The driving unit 140a may include an engine, a motor, a powertrain, a wheel, a brake, asteering device, and so on. The power supply unit 140 b may supply powerto the vehicle or the autonomous driving vehicle 100 and include awired/wireless charging circuit, a battery, and so on. The sensor unit140 c may acquire information about a vehicle state, ambient environmentinformation, user information, and so on. The sensor unit 140 c mayinclude an inertial measurement unit (IMU) sensor, a collision sensor, awheel sensor, a speed sensor, a slope sensor, a weight sensor, a headingsensor, a position module, a vehicle forward/backward sensor, a batterysensor, a fuel sensor, a tire sensor, a steering sensor, a temperaturesensor, a humidity sensor, an ultrasonic sensor, an illumination sensor,a pedal position sensor, and so on. The autonomous driving unit 140 dmay implement technology for maintaining a lane on which the vehicle isdriving, technology for automatically adjusting speed, such as adaptivecruise control, technology for autonomously driving along a determinedpath, technology for driving by automatically setting a route if adestination is set, and the like.

For example, the communication unit 110 may receive map data, trafficinformation data, and so on from an external server. The autonomousdriving unit 140 d may generate an autonomous driving route and adriving plan from the obtained data. The control unit 120 may controlthe driving unit 140 a such that the vehicle or autonomous drivingvehicle 100 may move along the autonomous driving route according to thedriving plan (e.g., speed/direction control). During autonomous driving,the communication unit 110 may aperiodically/periodically acquire recenttraffic information data from the external server and acquiresurrounding traffic information data from neighboring vehicles. Duringautonomous driving, the sensor unit 140 c may obtain information about avehicle state and/or surrounding environment information. The autonomousdriving unit 140 d may update the autonomous driving route and thedriving plan based on the newly obtained data/information. Thecommunication unit 110 may transfer information about a vehicleposition, the autonomous driving route, and/or the driving plan to theexternal server. The external server may predict traffic informationdata using AI technology based on the information collected fromvehicles or autonomous driving vehicles and provide the predictedtraffic information data to the vehicles or the autonomous drivingvehicles.

Those skilled in the art will appreciate that the present disclosure maybe carried out in other specific ways than those set forth hereinwithout departing from the spirit and essential characteristics of thepresent disclosure. The above embodiments are therefore to be construedin all aspects as illustrative and not restrictive. The scope of thedisclosure should be determined by the appended claims and their legalequivalents, not by the above description, and all changes coming withinthe meaning and equivalency range of the appended claims are intended tobe embraced therein.

As described above, the present disclosure is applicable to variouswireless communication systems.

What is claimed is:
 1. A method of receiving a signal from a userequipment (UE) by a base station (BS) operating in a wirelesscommunication system, the method comprising: transmitting configurationinformation; and receiving a Physical Uplink Control Channel (PUCCH) onan interlace based on the configuration information, wherein the PUCCHincludes a PUCCH sequence of which a Cyclic Shift (CS) value depends ona Resource Block (RB) number for each of RBs in the interlace, andwherein the CS value varies based on a value obtained by 5*n, where n isthe RB number in the interlace.
 2. The method of claim 1, wherein aPhase Shift (PS) value of the PUCCH sequence varies based on each RBnumber in the interlace, and wherein the PS value is determined by aspecific pattern to have a value for each RB in the interlace.
 3. Themethod of claim 2, wherein the specific pattern is determined in such amanner that a PS value of an RB with a lowest RB number in the interlaceis fixed to 1 and PS values to be applied to remaining RBs in theinterlace are selected based on a peak to average power ratio (PAPR) anda cube metric (CM).
 4. The method of claim 1, wherein RB numbers areassigned sequentially to the RBs in the interlace based on frequencypositions of the RBs in the interlace.
 5. A base station (BS) configuredto receive a signal in a wireless communication system, the BScomprising: at least one transceiver; at least one processor; and atleast one memory operably connected to the at least one processor andconfigured to store instructions that, when executed, cause the at leastone processor to perform operations comprising: transmittingconfiguration information; and receiving a Physical Uplink ControlChannel (PUCCH) on an interlace based on the configuration information,wherein the PUCCH includes a PUCCH sequence of which a Cyclic Shift (CS)value depends on a Resource Block (RB) number for each of RBs in theinterlace, and wherein the CS value varies based on a value obtained by5*n, where n is the RB number in the interlace.
 6. The BS of claim 5,wherein a Phase Shift (PS) value of the PUCCH sequence varies based oneach RB number in the interlace, and wherein the PS value is determinedby a specific pattern to have a value for each RB in the interlace. 7.The BS of claim 6, wherein the specific pattern is determined in such amanner that a PS value of an RB with a lowest RB number in the interlaceis fixed to 1 and PS values to be applied to remaining RBs in theinterlace are selected based on a peak to average power ratio (PAPR) anda cube metric (CM).
 8. The BS of claim 5, wherein RB numbers areassigned sequentially to the RBs in the interlace based on frequencypositions of the RBs in the interlace.